Disk Write Speed

[xhitm3n]

Hi all,
i Am transferring 200GB to my file server which is a lxc Container with ubuntu 15.04 and samba server, im uploading to file server from the explorer, i get Speeds from 40mb/s to 120mb/s but is always going up and down, sometimes it stabilizes at 70mb/s then starts up and down again, the container is using 1CPU, it goes max at 40% so no need to increase cores, at idle it uses 80mb Ram but at writing it uses full 512mb, and its using 20mb of swap, should increase RAM for the speeds stabilize? the disk is mounted in the host, and is ext4 then i pass it to the container!
thanks in advance!

 

[Dragoon]

What are the disk speed of the host node look like?

How do you have your config setup for the container?

 

[xhitm3n]

hi
here is a disk benchmark

time sh -c "dd if=/dev/zero of=ddfile bs=8k count=250000 && sync"; rm ddfile250000+0 records in
250000+0 records out
2048000000 bytes (2.0 GB) copied, 17.0729 s, 120 MB/s


real    0m22.017s
user    0m0.032s
sys     0m1.940s

and here is the Container .conf
mp0 and mp1 are the mounts of the disk

arch: amd64
cpulimit: 1
cpuunits: 1024
hostname: xhitFile
memory: 512
mp0: /mnt/sdb1,mp=/mnt/sdb1
mp1: /mnt/sdb1,mp=/mnt/sdb1
net0: bridge=vmbr1,hwaddr=66:61:64:31:35:65,ip=dhcp,name=eth1,type=veth
onboot: 1
ostype: ubuntu
rootfs: local:101/vm-101-disk-1.raw,size=10G
startup: up=10
swap: 512

--EDIT---
OK for my understanding, the problem here is really the RAM, i would need maybe some SSD for cache, because i upgraded to 1GB ram and it full utilize it, when it reaches 1GB it starts slowing down, isnt a problem though, thanks anyway!

 

[LnxBil]

Are you transfering big files or also small ones? Naturally, a lot of small files is much slower than a bunch of big ones even if the total amount of GBs is equal.