backup throttling on external nfs

X

x86fantini

Member
Aug 24, 2013
33
0
6
Hi, here in my office i have a 4.4 installation with a bunch of VM's created on local lvm storage.

this is my pveperf

root@proxmox:~# pveperf
CPU BOGOMIPS: 146834.40
REGEX/SECOND: 1497245
HD SIZE: 19.56 GB (/dev/dm-0)
BUFFERED READS: 109.87 MB/sec
AVERAGE SEEK TIME: 5.26 ms
FSYNCS/SECOND: 2512.88
DNS EXT: 20.43 ms
DNS INT: 23.38 ms (neen.lan)


i have created a freenas server (physical hp server, dual cpu + 64gb ram), exposed a NFS share and connected to proxmox, for backing up.

my backup log looks like this

NFO: status: 0% (411303936/88046829568), sparse 0% (85712896), duration 3, 137/108 MB/s
INFO: status: 1% (892469248/88046829568), sparse 0% (98938880), duration 7, 120/116 MB/s
INFO: status: 2% (1831534592/88046829568), sparse 0% (102686720), duration 65, 16/16 MB/s
INFO: status: 3% (2691170304/88046829568), sparse 0% (106549248), duration 138, 11/11 MB/s
INFO: status: 4% (3593469952/88046829568), sparse 0% (116822016), duration 145, 128/127 MB/s
INFO: status: 5% (4465164288/88046829568), sparse 0% (125587456), duration 227, 10/10 MB/s
INFO: status: 6% (5378539520/88046829568), sparse 0% (130572288), duration 234, 130/129 MB/s
INFO: status: 7% (6237061120/88046829568), sparse 0% (137998336), duration 241, 122/121 MB/s
INFO: status: 8% (7126450176/88046829568), sparse 0% (155504640), duration 340, 8/8 MB/s
INFO: status: 9% (8031698944/88046829568), sparse 0% (160280576), duration 402, 14/14 MB/s
INFO: status: 10% (8829665280/88046829568), sparse 0% (162197504), duration 408, 132/132 MB/s
INFO: status: 11% (9758703616/88046829568), sparse 0% (221442048), duration 476, 13/12 MB/s
INFO: status: 12% (10625810432/88046829568), sparse 0% (330727424), duration 493, 51/44 MB/s
INFO: status: 13% (11464081408/88046829568), sparse 0% (506228736), duration 499, 139/110 MB/s
INFO: status: 14% (12402491392/88046829568), sparse 0% (673419264), duration 506, 134/110 MB/s
INFO: status: 15% (13287817216/88046829568), sparse 0% (677105664), duration 513, 126/125 MB/s
INFO: status: 16% (14106951680/88046829568), sparse 0% (680026112), duration 519, 136/136 MB/s
INFO: status: 17% (15046410240/88046829568), sparse 0% (681558016), duration 688, 5/5 MB/s
INFO: status: 18% (15880224768/88046829568), sparse 0% (681787392), duration 697, 92/92 MB/s
INFO: status: 19% (16776822784/88046829568), sparse 0% (689991680), duration 821, 7/7 MB/s
INFO: status: 20% (17728536576/88046829568), sparse 0% (693927936), duration 888, 14/14 MB/s
INFO: status: 21% (18497863680/88046829568), sparse 0% (729415680), duration 894, 128/122 MB/s
INFO: status: 22% (19426902016/88046829568), sparse 0% (733573120), duration 901, 132/132 MB/s
INFO: status: 23% (20282408960/88046829568), sparse 0% (745357312), duration 908, 122/120 MB/s
INFO: status: 24% (21166751744/88046829568), sparse 0% (748744704), duration 1068, 5/5 MB/s
INFO: status: 25% (22034710528/88046829568), sparse 0% (761610240), duration 1075, 123/122 MB/s
INFO: status: 26% (22935764992/88046829568), sparse 0% (765349888), duration 1082, 128/128 MB/s
INFO: status: 27% (23775805440/88046829568), sparse 0% (843919360), duration 1089, 120/108 MB/s
INFO: status: 28% (24691867648/88046829568), sparse 0% (864751616), duration 1239, 6/5 MB/s


so, after 3/4 times at 100mb/s, drops to 5mb/s...

and this happens to all backups, to all VMs.

has anyone a suggestion on what is happening and how can i speed up the process?

thnak you
S
 
just to be clear, proxmox is a standalone physical server (dual cpu + 32gb ram) and freenas is a standalone server, both here in my office, connected to gigabit switch
 
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