Backup very slow on Proxmox 3

wahmed

wahmed

Famous Member
Proxmox Subscriber
Oct 28, 2012
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Calgary, Canada
www.symmcom.com
I am noticing a significant drop in Backup spee dafter i upgraded to Proxmox 3. Everything is same. There was no hardware changes or any software except proxmox 3. All VMs are on shared storage on OmniOS+Napp-IT NFS Share.
Is it just me ? Tried to search the forum, but i do not seem to find anybody having anu issue with backup speed. Before the upgrade backup speed was done in 3 hr 24 mins. But now the exact same backup of same size takes 7hr 44 mins. All VMs are qcow2.
Thanks for any help!
 
spirit said:
can you post your nfs mount options ?
Click to expand...

Sorry for my ignorance, but which NFS mount options did you need? I created Pool>ZFS File System in OmniOS+Napp-IT, then just clicked to enable NFS on the filesystem, it created the share on its own. But i could pull up the NFS properties on OmniOS server. Not sure if this is the info you needed though.

NFS properties: sharectl get nfsservers=16
lockd_listen_backlog=32
lockd_servers=20
lockd_retransmit_timeout=5
grace_period=90
server_versmin=2
server_versmax=4
client_versmin=2
client_versmax=4
server_delegation=on
nfsmapid_domain=
max_connections=-1
protocol=ALL
listen_backlog=32
device=
 
Server : Intel i5-3570 3.4Ghz 32GB RAM
OS : OmniOS+Napp-IT
HDD : 3 x 2TB Seagate
RAID : Raid-Z1 No DeDup
Hardware RAID : No
Used Data : 221 GB

Hopefully these are the info you were looking for.
 
What does this show:
cat /etc/pve/storage.cfg

Look for the options line under your Omnios share

Mine reads: options vers=3,tcp,noatime

Also what does the following show for your Omnios share:
cat /proc/mounts

Especially look for rsize and wsize, mine reads: rsize=1048576,wsize=1048576 which is max record size.
 
Under storage.cfg it shows the following for OmniOS Share:
options vers=3

For /proc/mounts, it does show rsize=1048576,wsize=1048576 for OmniOS Share.

For storage.cfg, i went ahead and added options vers=3,notime, but still same slow backup issue.
 
Opps, ya i did forget the tcp.
Even after adding the tcp, restarting all the nodes, backup speed stays low around 45 mib/s on Gigabit network. All my VM discs are qcow2. Does that have any effect? Should i convert them to raw and try again ?
 
maybe this can help ?

before upgrading to v3 I was using "pigz" for compression. During the upgrade pigz was replaced by gzip again. Now I switched to lzo for compression which is much better and faster.
Even so I am using the raw format for my Windows VM's I use "sdelete" to zero out empty spaces in Windows once a week. This reduces the compression time alot.
I use OmniOS+Napp-it-to-Go my self for backup storage but I use smb for that. My speed is arround 80-100 mb/s or higher.

Here a sample from one of my backups:
102: Jun 09 03:51:12 INFO: transferred 386547 MB in 3070 seconds (125 MB/s)
102: Jun 09 03:51:12 INFO: archive file size: 102.74GB
102: Jun 09 03:51:12 INFO: delete old backup '/mnt/pve/OMV_Backup/dump/vzdump-qemu-102-2013_05_30-03_00_03.vma.gz'
102: Jun 09 03:51:18 INFO: Finished Backup of VM 102 (00:51:17)
 
Last edited:
I was looking at one of my customer side. They are using nfs in combination with OmniOS+Napp-It:
storage.cfg looks like this:

nfs: NFS-Manu
path /mnt/pve/NFS-Manu
server 192.168.178.8
export /RaidZ/bigone/manu
options vers=3
content backup
nodes BigOne
maxfiles 10


nfs: NFS-LAB
path /mnt/pve/NFS-LAB
server 192.168.178.8
export /RaidZ/bigone/LAB
options vers=3
content backup
maxfiles 5
 
BitRausch said:
before upgrading to v3 I was using "pigz" for compression. During the upgrade pigz was replaced by gzip again. Now I switched to lzo for compression which is much better and faster.
Even so I am using the raw format for my Windows VM's I use "sdelete" to zero out empty spaces in Windows once a week. This reduces the compression time alot.
I use OmniOS+Napp-it-to-Go my self for backup storage but I use smb for that. My speed is arround 80-100 mb/s or higher.

Here a sample from one of my backups:
102: Jun 09 03:51:12 INFO: transferred 386547 MB in 3070 seconds (125 MB/s)
102: Jun 09 03:51:12 INFO: archive file size: 102.74GB
102: Jun 09 03:51:12 INFO: delete old backup '/mnt/pve/OMV_Backup/dump/vzdump-qemu-102-2013_05_30-03_00_03.vma.gz'
102: Jun 09 03:51:18 INFO: Finished Backup of VM 102 (00:51:17)
Click to expand...

125 mb/s?? I would be way more than happy with that speed. Are you on Gigabit network or higher?

This is what i have in my Storage.cfg:
nfs: nfs-Omni-backup-02
path /mnt/pve/nfs-Omni-backup-02
server 192.101.60.12
export /symmOmni-pool-01/symmOmni-zfs-02
options vers=3,tcp,noatime
content backup
maxfiles 12

I am on Gigabit network. I tried with both qcow2 and raw format, but backup speed stayed the same.
 
symmcom said:
I am on Gigabit network. I tried with both qcow2 and raw format, but backup speed stayed the same.
Click to expand...

I am on a Gigabit network too. I use a HP MicroServer N40L with 4 WD Red 2 TB in one RaidZ vdev. I use a second NIC in my HP as a dedicated "Backup Line".

This is how mount looks like for NFS:
Code: 
192.168.178.8:/RaidZ/bigone/manu on /mnt/pve/NFS-Manu type nfs (rw,relatime,vers=3,rsize=1048576,wsize=1048576,namlen=255,hard,proto=tcp,timeo=600,retrans=2,sec=sys,mountaddr=192.168.178.8,mountvers=3,mountport=42941,mountproto=udp,local_lock=none,addr=192.168.178.8)
 
BitRausch said:
Code: 
192.168.178.8:/RaidZ/bigone/manu on /mnt/pve/NFS-Manu type nfs (rw,relatime,vers=3,rsize=1048576,wsize=1048576,namlen=255,hard,proto=tcp,timeo=600,retrans=2,sec=sys,mountaddr=192.168.178.8,mountvers=3,mountport=42941,mountproto=udp,local_lock=none,addr=192.168.178.8)
Click to expand...

My NFS Share:
Code: 
192.101.60.12:/symmOmni-pool-01/symmOmni-zfs-02 /mnt/pve/nfs-Omni-backup-02 nfs rw,relatime,vers=3,rsize=1048576,wsize=1048576,namlen=255,hard,proto=tcp,timeo=600,retrans=2,sec=sys,mountaddr=192.101.60.12,mountvers=3,mountport=63695,mountproto=udp,local_lock=none,addr=192.101.60.12 0 0

It looks exactly the same except the in mine mountport is 63695 instead of yours 42941. But that should not matter i dont think. The network 192.101.60.0/24 is dedicated for Backup only. There is no other traffic happening.
 
I don't think the port matters. Do you have compression and/or dedup on on your ZFS machine ? Your pool maybe above 85% full ?
Maybe you can test with a regular directory (smb) on your ZFS as a backup location. See if you still get the bad performance...
 
BitRausch said:
I don't think the port matters. Do you have compression and/or dedup on on your ZFS machine ? Your pool maybe above 85% full ?
Maybe you can test with a regular directory (smb) on your ZFS as a backup location. See if you still get the bad performance...
Click to expand...

I do not have Compression or DeDup turned on on any NFS/SMB. The pool on OmniOS is 1.8TB out of which only 231GB is used currently. Here are some fresh numbers below, hopefully this will make some sense.....

Backup speed in Proxmox with Writeback cache enabled(LZO with VM stopped):
FreeNAS NFS=102 mib/s
OmniOS NFS =105 mib/s

Backup speed in Proxmox with no cache(LZO with VM stopped):
FreeNAS NFS=65 mib/s
OmniOS NFS =64 mib/s

SMB Copy only:
From FreeNAS SMB to Windows 7 : 92 mib/s
From OmniOS SMB to Windows 7 : 77 mib/s

From Windows 7 to FreeNAS SMB : 49 mib/s
From Windows 7 to OmniOS SMB : 42 mib/s

Anybody seeing any pattern? This is almost getting frustrating, but i am going to see the bottom of it no matter how long i have to fight for ! :confused:
 
Hi,

I just want to share my backup-experience with you.
It is done via nfs to a QNAP TS-459U+.

INFO: transferred 161061 MB in 606 seconds (265 MB/s)
INFO: archive file size: 13.07GB
INFO: Finished Backup of VM 102 (00:10:10)
INFO: Starting Backup of VM 103 (qemu)
INFO: status = running
INFO: exclude disk 'virtio1' (backup=no)
INFO: exclude disk 'virtio2' (backup=no)
INFO: backup mode: snapshot
INFO: bandwidth limit: 1024000 KB/s
INFO: ionice priority: 7
INFO: creating archive '/mnt/pve/qnap-vzdump/dump/vzdump-qemu-103-2013_06_09-02_22_24.vma.lzo'
Click to expand...

cheers
mac
 
Was does the following command show on your Omnios box?
zpool status <your pool>

Try this command when doing backup and post the output here:
zpool iostat <your pool> 5

When I do a backup I see peaks like this:
capacity operations bandwidth
pool alloc free read write read write
---------- ----- ----- ----- ----- ----- -----
vMotion 9.88G 918G 0 408 0 40.5M
mirror 9.88G 918G 0 408 0 40.5M
c1t0d0 - - 0 369 0 40.5M
c1t2d0 - - 0 362 0 39.9M
---------- ----- ----- ----- ----- ----- -----

INFO: transferred 4294 MB in 132 seconds (32 MB/s)
INFO: archive file size: 1.62GB
INFO: Finished Backup of VM 117 (00:02:16)

I have LZ4 compression active on the box so the numbers would likely be higher given compression was deactivated.

Details of my Omnios box (using smbios):
ID SIZE TYPE
2 120 SMB_TYPE_BASEBOARD (base board)


Manufacturer: ASRock
Product: E350M1
Version:
Serial Number:
Asset Tag:
Location Tag:


Chassis: 3
Flags: 0x9
SMB_BBFL_MOTHERBOARD (board is a motherboard)
SMB_BBFL_REPLACABLE (board is field-replacable)
Board Type: 0xa (motherboard)

ID SIZE TYPE
4 186 SMB_TYPE_PROCESSOR (processor)



Manufacturer: AMD E-350 Process
Version: AMD E-350 Processor
Serial Number: To Be Filled By O.E.M.
Asset Tag: To Be Filled By O.E.M.
Location Tag: CPUSocket
Part Number: To Be Filled By O.E.M.


Family: 71
CPUID: 0x178bfbff00500f10
Type: 3 (central processor)
Socket Upgrade: 6 (none)
Socket Status: Populated
Processor Status: 1 (enabled)
Supported Voltages: 1.3V
External Clock Speed: Unknown
Maximum Speed: 1600MHz
Current Speed: 1600MHz
L1 Cache: 5
L2 Cache: 6
L3 Cache: None

Physical Memory Array: 10
Memory Error Data: Not Supported
Total Width: 64 bits
Data Width: 64 bits
Size: 4294967296 bytes
Form Factor: 9 (DIMM)
Set: None
Memory Type: 24
Flags: 0x4080
SMB_MDF_SYNC (synchronous)
0x4000
Speed: 1ns
Device Locator: A1_DIMM0
Bank Locator: A1_BANK0


Physical Memory Array: 10
Memory Error Data: Not Supported
Total Width: 64 bits
Data Width: 64 bits
Size: 4294967296 bytes
Form Factor: 9 (DIMM)
Set: None
Memory Type: 24
Flags: 0x4080
SMB_MDF_SYNC (synchronous)
0x4000
Speed: 1ns
Device Locator: A1_DIMM1
Bank Locator: A1_BANK1
 
Zpool status:
Code: 
  pool: symmOmni-pool-01
 state: ONLINE
status: The pool is formatted using a legacy on-disk format.  The pool can
	still be used, but some features are unavailable.
action: Upgrade the pool using 'zpool upgrade'.  Once this is done, the
	pool will no longer be accessible on software that does not support feature
	flags.
  scan: none requested
config:


	NAME        STATE     READ WRITE CKSUM
	symmOmni-pool-01  ONLINE       0     0     0
	  c3t0d0    ONLINE       0     0     0
	  c3t1d0    ONLINE       0     0     0
	  c3t2d0    ONLINE       0     0     0


errors: No known data errors

smbios output for Omni box:
Code: 
ID    SIZE TYPE
0     79   SMB_TYPE_BIOS (BIOS information)


  Vendor: Intel Corp.
  Version String: EBH7710H.86A.0099.2013.0125.1400
  Release Date: 01/25/2013
  Address Segment: 0xf000
  ROM Size: 8388608 bytes
  Image Size: 65536 bytes
  Characteristics: 0x1378b9880
	SMB_BIOSFL_PCI (PCI is supported)
	SMB_BIOSFL_FLASH (BIOS is Flash Upgradeable)
	SMB_BIOSFL_SHADOW (BIOS shadowing is allowed)
	SMB_BIOSFL_CDBOOT (Boot from CD is supported)
	SMB_BIOSFL_SELBOOT (Selectable Boot supported)
	SMB_BIOSFL_ROMSOCK (BIOS ROM is socketed)
	SMB_BIOSFL_EDD (EDD Spec is supported)
	SMB_BIOSFL_525_12M (int 0x13 5.25" 1.2M floppy)
	SMB_BIOSFL_35_720K (int 0x13 3.5" 720K floppy)
	SMB_BIOSFL_35_288M (int 0x13 3.5" 2.88M floppy)
	SMB_BIOSFL_I5_PRINT (int 0x5 print screen svcs)
	SMB_BIOSFL_I14_SER (int 0x14 serial svcs)
	SMB_BIOSFL_I17_PRINTER (int 0x17 printer svcs)
	0x100000000
  Characteristics Extension Byte 1: 0x3
	SMB_BIOSXB1_ACPI (ACPI is supported)
	SMB_BIOSXB1_USBL (USB legacy is supported)
  Characteristics Extension Byte 2: 0xd
	SMB_BIOSXB2_BBOOT (BIOS Boot Specification supported)
	SMB_BIOSXB2_ETCDIST (Enable Targeted Content Distrib.)
	0x8
  Version Number: 0.0
  Embedded Ctlr Firmware Version Number: 0.0


ID    SIZE TYPE
1     208  SMB_TYPE_SYSTEM (system information)


  Manufacturer:                                  
  Product:                                  
  Version:                                  
  Serial Number:                                  


  UUID: 9a4bc236-688f-11e1-a8e1-0013207a6641
  Wake-Up Event: 0x6 (power switch)
  SKU Number: To be filled by O.E.M.
  Family: To be filled by O.E.M.


ID    SIZE TYPE
2     99   SMB_TYPE_BASEBOARD (base board)


  Manufacturer: Intel Corporation
  Product: DH77EB
  Version: AAG39073-304
  Serial Number: BQEB209003VB
  Asset Tag:                                  


  Chassis: 3
  Flags: 0x9
	SMB_BBFL_MOTHERBOARD (board is a motherboard)
	SMB_BBFL_REPLACABLE (board is field-replacable)
  Board Type: 0xa (motherboard)


ID    SIZE TYPE
3     180  SMB_TYPE_CHASSIS (system enclosure or chassis)


  Manufacturer:                                  
  Version:                                  
  Serial Number:                                  
  Asset Tag:                                  


  OEM Data: 0x0
  Lock Present: N
  Chassis Type: 0x3 (desktop)
  Boot-Up State: 0x3 (safe)
  Power Supply State: 0x3 (safe)
  Thermal State: 0x3 (safe)
  Chassis Height: 0u
  Power Cords: 1
  Element Records: 0


ID    SIZE TYPE
4     34   SMB_TYPE_CACHE (processor cache)


  Location Tag: CPU Internal L1


  Level: 1
  Maximum Installed Size: 262144 bytes
  Installed Size: 262144 bytes
  Speed: Unknown
  Supported SRAM Types: 0x2
	SMB_CAT_UNKNOWN (unknown)
  Current SRAM Type: 0x2 (unknown)
  Error Correction Type: 4 (parity)
  Logical Cache Type: 4 (data)
  Associativity: 7 (8-way set associative)
  Mode: 0 (write-through)
  Location: 0 (internal)
  Flags: 0x1
	SMB_CAF_ENABLED (enabled at boot time)


ID    SIZE TYPE
5     34   SMB_TYPE_CACHE (processor cache)


  Location Tag: CPU Internal L2


  Level: 2
  Maximum Installed Size: 1048576 bytes
  Installed Size: 1048576 bytes
  Speed: Unknown
  Supported SRAM Types: 0x2
	SMB_CAT_UNKNOWN (unknown)
  Current SRAM Type: 0x2 (unknown)
  Error Correction Type: 6 (multi-bit ECC)
  Logical Cache Type: 5 (unified)
  Associativity: 7 (8-way set associative)
  Mode: 0 (write-through)
  Location: 0 (internal)
  Flags: 0x1
	SMB_CAF_ENABLED (enabled at boot time)


ID    SIZE TYPE
6     34   SMB_TYPE_CACHE (processor cache)


  Location Tag: CPU Internal L3


  Level: 3
  Maximum Installed Size: 6291456 bytes
  Installed Size: 6291456 bytes
  Speed: Unknown
  Supported SRAM Types: 0x2
	SMB_CAT_UNKNOWN (unknown)
  Current SRAM Type: 0x2 (unknown)
  Error Correction Type: 6 (multi-bit ECC)
  Logical Cache Type: 5 (unified)
  Associativity: 9
  Mode: 1 (write-back)
  Location: 0 (internal)
  Flags: 0x1
	SMB_CAF_ENABLED (enabled at boot time)


ID    SIZE TYPE
7     23   SMB_TYPE_MEMARRAY (physical memory array)


  Location: 3 (system board or motherboard)
  Use: 3 (system memory)
  ECC: 3 (none)
  Number of Slots/Sockets: 4
  Memory Error Data: Not Supported
  Max Capacity: 34359738368 bytes


ID    SIZE TYPE
8     22   SMB_TYPE_PORT (port connector)


  Location Tag: J1A1


  Internal Reference Designator: J1A1
  External Reference Designator: PS2Mouse
  Internal Connector Type: 0 (none)
  External Connector Type: 15 (PS/2)
  Port Type: 14 (Mouse port)


ID    SIZE TYPE
9     22   SMB_TYPE_PORT (port connector)


  Location Tag: J1A1


  Internal Reference Designator: J1A1
  External Reference Designator: Keyboard
  Internal Connector Type: 0 (none)
  External Connector Type: 15 (PS/2)
  Port Type: 13 (Keyboard port)


ID    SIZE TYPE
10    20   SMB_TYPE_PORT (port connector)


  Location Tag: J2A1


  Internal Reference Designator: J2A1
  External Reference Designator: TV Out
  Internal Connector Type: 0 (none)
  External Connector Type: 29 (Mini-Centronics Type 14)
  Port Type: 255 (other)


ID    SIZE TYPE
11    20   SMB_TYPE_PORT (port connector)


  Location Tag: J2A2A


  Internal Reference Designator: J2A2A
  External Reference Designator: COM A
  Internal Connector Type: 0 (none)
  External Connector Type: 8 (DB-9 pin male)
  Port Type: 9 (Serial Port 16550A compat)


ID    SIZE TYPE
12    20   SMB_TYPE_PORT (port connector)


  Location Tag: J2A2B


  Internal Reference Designator: J2A2B
  External Reference Designator: Video
  Internal Connector Type: 0 (none)
  External Connector Type: 7 (DB-15 pin female)
  Port Type: 28 (Video port)


ID    SIZE TYPE
13    18   SMB_TYPE_PORT (port connector)


  Location Tag: J3A1


  Internal Reference Designator: J3A1
  External Reference Designator: USB1
  Internal Connector Type: 0 (none)
  External Connector Type: 18 (USB)
  Port Type: 16 (USB)


ID    SIZE TYPE
14    18   SMB_TYPE_PORT (port connector)


  Location Tag: J3A1


  Internal Reference Designator: J3A1
  External Reference Designator: USB2
  Internal Connector Type: 0 (none)
  External Connector Type: 18 (USB)
  Port Type: 16 (USB)


ID    SIZE TYPE
15    18   SMB_TYPE_PORT (port connector)


  Location Tag: J3A1


  Internal Reference Designator: J3A1
  External Reference Designator: USB3
  Internal Connector Type: 0 (none)
  External Connector Type: 18 (USB)
  Port Type: 16 (USB)


ID    SIZE TYPE
16    23   SMB_TYPE_PORT (port connector)


  Location Tag: J9A1 - TPM HDR


  Internal Reference Designator: J9A1 - TPM HDR
  External Reference Designator: 
  Internal Connector Type: 255 (other)
  External Connector Type: 0 (none)
  Port Type: 255 (other)


ID    SIZE TYPE
17    33   SMB_TYPE_PORT (port connector)


  Location Tag: J9C1 - PCIE DOCKING CONN


  Internal Reference Designator: J9C1 - PCIE DOCKING CONN
  External Reference Designator: 
  Internal Connector Type: 255 (other)
  External Connector Type: 0 (none)
  Port Type: 255 (other)


ID    SIZE TYPE
18    23   SMB_TYPE_PORT (port connector)


  Location Tag: J2B3 - CPU FAN


  Internal Reference Designator: J2B3 - CPU FAN
  External Reference Designator: 
  Internal Connector Type: 255 (other)
  External Connector Type: 0 (none)
  Port Type: 255 (other)


ID    SIZE TYPE
19    24   SMB_TYPE_PORT (port connector)


  Location Tag: J6C2 - EXT HDMI


  Internal Reference Designator: J6C2 - EXT HDMI
  External Reference Designator: 
  Internal Connector Type: 255 (other)
  External Connector Type: 0 (none)
  Port Type: 255 (other)


ID    SIZE TYPE
20    24   SMB_TYPE_PORT (port connector)


  Location Tag: J3C1 - GMCH FAN


  Internal Reference Designator: J3C1 - GMCH FAN
  External Reference Designator: 
  Internal Connector Type: 255 (other)
  External Connector Type: 0 (none)
  Port Type: 255 (other)


ID    SIZE TYPE
21    19   SMB_TYPE_PORT (port connector)


  Location Tag: J1D1 - ITP


  Internal Reference Designator: J1D1 - ITP
  External Reference Designator: 
  Internal Connector Type: 255 (other)
  External Connector Type: 0 (none)
  Port Type: 255 (other)


ID    SIZE TYPE
22    26   SMB_TYPE_PORT (port connector)


  Location Tag: J9E2 - MDC INTPSR


  Internal Reference Designator: J9E2 - MDC INTPSR
  External Reference Designator: 
  Internal Connector Type: 255 (other)
  External Connector Type: 0 (none)
  Port Type: 255 (other)


ID    SIZE TYPE
23    26   SMB_TYPE_PORT (port connector)


  Location Tag: J9E4 - MDC INTPSR


  Internal Reference Designator: J9E4 - MDC INTPSR
  External Reference Designator: 
  Internal Connector Type: 255 (other)
  External Connector Type: 0 (none)
  Port Type: 255 (other)


ID    SIZE TYPE
24    31   SMB_TYPE_PORT (port connector)


  Location Tag: J9E3 - LPC HOT DOCKING


  Internal Reference Designator: J9E3 - LPC HOT DOCKING
  External Reference Designator: 
  Internal Connector Type: 255 (other)
  External Connector Type: 0 (none)
  Port Type: 255 (other)


ID    SIZE TYPE
25    27   SMB_TYPE_PORT (port connector)


  Location Tag: J9E1 - SCAN MATRIX


  Internal Reference Designator: J9E1 - SCAN MATRIX
  External Reference Designator: 
  Internal Connector Type: 255 (other)
  External Connector Type: 0 (none)
  Port Type: 255 (other)


ID    SIZE TYPE
26    29   SMB_TYPE_PORT (port connector)


  Location Tag: J9G1 - LPC SIDE BAND


  Internal Reference Designator: J9G1 - LPC SIDE BAND
  External Reference Designator: 
  Internal Connector Type: 255 (other)
  External Connector Type: 0 (none)
  Port Type: 255 (other)


ID    SIZE TYPE
27    23   SMB_TYPE_PORT (port connector)


  Location Tag: J8F1 - UNIFIED


  Internal Reference Designator: J8F1 - UNIFIED
  External Reference Designator: 
  Internal Connector Type: 255 (other)
  External Connector Type: 0 (none)
  Port Type: 255 (other)


ID    SIZE TYPE
28    20   SMB_TYPE_PORT (port connector)


  Location Tag: J6F1 - LVDS


  Internal Reference Designator: J6F1 - LVDS
  External Reference Designator: 
  Internal Connector Type: 255 (other)
  External Connector Type: 0 (none)
  Port Type: 255 (other)


ID    SIZE TYPE
29    23   SMB_TYPE_PORT (port connector)


  Location Tag: J2F1 - LAI FAN


  Internal Reference Designator: J2F1 - LAI FAN
  External Reference Designator: 
  Internal Connector Type: 255 (other)
  External Connector Type: 0 (none)
  Port Type: 255 (other)


ID    SIZE TYPE
30    23   SMB_TYPE_PORT (port connector)


  Location Tag: J2G1 - GFX VID


  Internal Reference Designator: J2G1 - GFX VID
  External Reference Designator: 
  Internal Connector Type: 255 (other)
  External Connector Type: 0 (none)
  Port Type: 255 (other)


ID    SIZE TYPE
31    23   SMB_TYPE_PORT (port connector)


  Location Tag: J1G6 - AC JACK


  Internal Reference Designator: J1G6 - AC JACK
  External Reference Designator: 
  Internal Connector Type: 255 (other)
  External Connector Type: 0 (none)
  Port Type: 255 (other)


ID    SIZE TYPE
32    25   SMB_TYPE_SLOT (upgradeable system slot)


  Location Tag: PCIe_X16


  Reference Designator: PCIe_X16
  Slot ID: 0x0
  Type: 0xb0
  Width: 0xd (16x or x16)
  Usage: 0x3 (available)
  Length: 0x4 (long length)
  Slot Characteristics 1: 0xc
	SMB_SLCH1_33V (provides 3.3V)
	SMB_SLCH1_SHARED (opening shared with other slot)
  Slot Characteristics 2: 0x1
	SMB_SLCH2_PME (slot supports PME# signal)
  Segment Group: 0
  Bus Number: 0
  Device/Function Number: 8


ID    SIZE TYPE
33    113  SMB_TYPE_OBDEVS (on-board devices)


  Intel(R) HD Graphics Device
  Intel(R) 82579V Gigabit Network Device
  Realtek High Definition Audio Device


ID    SIZE TYPE
34    27   SMB_TYPE_OEMSTR (OEM string table)


  To Be Filled By O.E.M.


ID    SIZE TYPE
35    27   SMB_TYPE_SYSCONFSTR (system configuration string table)


  To Be Filled By O.E.M.


ID    SIZE TYPE
36    20   SMB_TYPE_BOOT (system boot status)


  Boot Status Code: 0x0 (no errors detected)
  Boot Data (9 bytes):


  offset:   0 1 2 3  4 5 6 7  8 9 a b  c d e f  0123456789abcdef
       0:  00000000 00000000 00                 .........       




ID    SIZE TYPE
37    38   SMB_TYPE_OBDEVEXT (on-board device extended info)


  Reference Designator: Intel(R) HD Graphics Device
  Device Type: 131
  Device Type Instance: 1
  Segment Group Number: 0
  Bus Number: 0
  Device/Function Number: 16


ID    SIZE TYPE
38    49   SMB_TYPE_OBDEVEXT (on-board device extended info)


  Reference Designator: Intel(R) 82579V Gigabit Network Device
  Device Type: 133
  Device Type Instance: 1
  Segment Group Number: 0
  Bus Number: 0
  Device/Function Number: 200


ID    SIZE TYPE
39    47   SMB_TYPE_OBDEVEXT (on-board device extended info)


  Reference Designator: Realtek High Definition Audio Device
  Device Type: 135
  Device Type Instance: 1
  Segment Group Number: 0
  Bus Number: 0
  Device/Function Number: 216


ID    SIZE TYPE
40    103  SMB_TYPE_MEMDEVICE (memory device)


  Manufacturer: M0
  Serial Number: BANK 0
  Asset Tag: Kingston
  Location Tag: DIMM3
  Part Number: 4224445C


  Physical Memory Array: 7
  Memory Error Data: Not Supported
  Total Width: 64 bits
  Data Width: 64 bits
  Size: 8589934592 bytes
  Form Factor: 9 (DIMM)
  Set: None
  Memory Type: 24
  Flags: 0x80
	SMB_MDF_SYNC (synchronous)
  Speed: Unknown
  Device Locator: DIMM3
  Bank Locator: DIMM3


ID    SIZE TYPE
41    35   SMB_TYPE_MEMDEVICEMAP (memory device mapped address)


  Memory Device: 40
  Memory Array Mapped Address: 49
  Physical Address: 0x0
  Size: 8589934592 bytes
  Partition Row Position: 255
  Interleave Position: 1
  Interleave Data Depth: 2


ID    SIZE TYPE
42    103  SMB_TYPE_MEMDEVICE (memory device)


  Manufacturer: M1
  Serial Number: BANK 1
  Asset Tag: Kingston
  Location Tag: DIMM1
  Part Number: 4223A77D


  Physical Memory Array: 7
  Memory Error Data: Not Supported
  Total Width: 64 bits
  Data Width: 64 bits
  Size: 8589934592 bytes
  Form Factor: 9 (DIMM)
  Set: None
  Memory Type: 24
  Flags: 0x80
	SMB_MDF_SYNC (synchronous)
  Speed: Unknown
  Device Locator: DIMM1
  Bank Locator: DIMM1


ID    SIZE TYPE
43    132  SMB_TYPE_PROCESSOR (processor)


  Manufacturer: Intel(R) Corporation
  Version: Intel(R) Core(TM) i5-3570 CPU @ 3.40GHz
  Asset Tag: Fill By OEM
  Location Tag: CPU 1
  Part Number: Fill By OEM


  Family: 205
  CPUID: 0xbfebfbff000306a9
  Type: 3 (central processor)
  Socket Upgrade: 36
  Socket Status: Populated
  Processor Status: 1 (enabled)
  Supported Voltages: 9.6V
  External Clock Speed: Unknown
  Maximum Speed: 3800MHz
  Current Speed: 3400MHz
  L1 Cache: 4
  L2 Cache: 5
  L3 Cache: 6


ID    SIZE TYPE
44    35   SMB_TYPE_MEMDEVICEMAP (memory device mapped address)


  Memory Device: 42
  Memory Array Mapped Address: 49
  Physical Address: 0x400000000
  Size: 8589934592 bytes
  Partition Row Position: 255
  Interleave Position: 1
  Interleave Data Depth: 2


ID    SIZE TYPE
45    103  SMB_TYPE_MEMDEVICE (memory device)


  Manufacturer: M0
  Serial Number: BANK 2
  Asset Tag: Kingston
  Location Tag: DIMM4
  Part Number: 4023A47D


  Physical Memory Array: 7
  Memory Error Data: Not Supported
  Total Width: 64 bits
  Data Width: 64 bits
  Size: 8589934592 bytes
  Form Factor: 9 (DIMM)
  Set: None
  Memory Type: 24
  Flags: 0x80
	SMB_MDF_SYNC (synchronous)
  Speed: Unknown
  Device Locator: DIMM4
  Bank Locator: DIMM4


ID    SIZE TYPE
46    35   SMB_TYPE_MEMDEVICEMAP (memory device mapped address)


  Memory Device: 45
  Memory Array Mapped Address: 49
  Physical Address: 0x200000000
  Size: 8589934592 bytes
  Partition Row Position: 255
  Interleave Position: 2
  Interleave Data Depth: 2


ID    SIZE TYPE
47    103  SMB_TYPE_MEMDEVICE (memory device)


  Manufacturer: M1
  Serial Number: BANK 3
  Asset Tag: Kingston
  Location Tag: DIMM2
  Part Number: D0397760


  Physical Memory Array: 7
  Memory Error Data: Not Supported
  Total Width: 64 bits
  Data Width: 64 bits
  Size: 4294967296 bytes
  Form Factor: 9 (DIMM)
  Set: None
  Memory Type: 24
  Flags: 0x80
	SMB_MDF_SYNC (synchronous)
  Speed: Unknown
  Device Locator: DIMM2
  Bank Locator: DIMM2


ID    SIZE TYPE
48    35   SMB_TYPE_MEMDEVICEMAP (memory device mapped address)


  Memory Device: 47
  Memory Array Mapped Address: 49
  Physical Address: 0x600000000
  Size: 4294967296 bytes
  Partition Row Position: 255
  Interleave Position: 2
  Interleave Data Depth: 2


ID    SIZE TYPE
49    31   SMB_TYPE_MEMARRAYMAP (memory array mapped address)


  Physical Memory Array: 7
  Devices per Row: 4
  Physical Address: 0x0
  Size: 30064771072 bytes


ID    SIZE TYPE
68    64   SMB_TYPE_OEM_LO+3


  offset:   0 1 2 3  4 5 6 7  8 9 a b  c d e f  0123456789abcdef
       0:  83404400 35000000 00000000 00000000  .@D.5...........
    0x10:  f8004a1e ffffffff 01200000 01000800  ..J.............
    0x20:  38051400 00000000 c8000315 00000000  8...............
    0x30:  00000000 66000000 7650726f 00000000  ....f...vPro....


ID    SIZE TYPE
69    25   SMB_TYPE_SLOT (upgradeable system slot)


  Location Tag: PCIe_X1 


  Reference Designator: PCIe_X1 
  Slot ID: 0x1
  Type: 0xac
  Width: 0x8 (1x or x1)
  Usage: 0x4 (in use)
  Length: 0x3 (short length)
  Slot Characteristics 1: 0xc
	SMB_SLCH1_33V (provides 3.3V)
	SMB_SLCH1_SHARED (opening shared with other slot)
  Slot Characteristics 2: 0x1
	SMB_SLCH2_PME (slot supports PME# signal)
  Segment Group: 0
  Bus Number: 0
  Device/Function Number: 226


ID    SIZE TYPE
70    25   SMB_TYPE_SLOT (upgradeable system slot)


  Location Tag: PCIe_X1 


  Reference Designator: PCIe_X1 
  Slot ID: 0x2
  Type: 0xac
  Width: 0x8 (1x or x1)
  Usage: 0x4 (in use)
  Length: 0x3 (short length)
  Slot Characteristics 1: 0xc
	SMB_SLCH1_33V (provides 3.3V)
	SMB_SLCH1_SHARED (opening shared with other slot)
  Slot Characteristics 2: 0x1
	SMB_SLCH2_PME (slot supports PME# signal)
  Segment Group: 0
  Bus Number: 0
  Device/Function Number: 228


ID    SIZE TYPE
71    25   SMB_TYPE_SLOT (upgradeable system slot)


  Location Tag: PCIe_X1 


  Reference Designator: PCIe_X1 
  Slot ID: 0x3
  Type: 0xac
  Width: 0x8 (1x or x1)
  Usage: 0x3 (available)
  Length: 0x3 (short length)
  Slot Characteristics 1: 0xc
	SMB_SLCH1_33V (provides 3.3V)
	SMB_SLCH1_SHARED (opening shared with other slot)
  Slot Characteristics 2: 0x1
	SMB_SLCH2_PME (slot supports PME# signal)
  Segment Group: 0
  Bus Number: 0
  Device/Function Number: 225


ID    SIZE TYPE
72    37   SMB_TYPE_LANG (BIOS language information)


  Current Language: en|US|iso8859-1
  Language String Format: 0
  Number of Installed Languages: 1
  Installed Languages:
  en|US|iso8859-1

iostat output while the backup was running:
Code: 
......................................................................
symmOmni-pool-01   448G  5.00T  0   806  0   98.0M
.......................................................................
.......................................................................
symmOmni-pool-01   451G  5.00T  0   627  0   75.0M
.......................................................................
One line item with 98.0M and another line item with 75.0M were the only two with peak. Rest of line items are around 30M or else.


Just to try out, i converted one of the VM to raw format from qcow2, enabled writethrough cache, then did a backup through Omni NFS share.
Code: 
[COLOR=#000000][FONT=tahoma]INFO: status: 100% (429526089728/429526089728), sparse 84% (364899454976), duration 4034, 116/27 MB/s[/FONT][/COLOR]
[COLOR=#000000][FONT=tahoma]INFO: transferred 429526 MB in 4034 seconds (106 MB/s)[/FONT][/COLOR]
[COLOR=#000000][FONT=tahoma]INFO: stopping kvm after backup task[/FONT][/COLOR]
[COLOR=#000000][FONT=tahoma]INFO: archive file size: 51.46GB[/FONT][/COLOR]
[COLOR=#000000][FONT=tahoma]INFO: Finished Backup of VM 100 (01:07:22)
[/FONT][/COLOR]

106 MB/s backup speed in 1hr 7 min! This is the exactly same backup i have been trying which took close to 3 hr every time. What do you think ?
 
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