Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
Hi,
How much do you get with iperf?
Lars Täuber wrote:
> Hi there!
>
> I'm new to the topic but managed to get a mirrored setup working.
> The only problem is the sync speed:
>
> # cat /proc/drbd
> version: 8.3.0 (api:88/proto:86-89)
> GIT-hash: 9ba8b93e24d842f0dd3fb1f9b90e8348ddb95829 build by root at monosan, 2009-01-09 15:15:29
> 0: cs:SyncTarget ro:Secondary/Secondary ds:Inconsistent/UpToDate C r---
> ns:0 nr:1275248 dw:1267056 dr:0 al:0 bm:77 lo:2050 pe:9009 ua:2048 ap:0 ep:1 wo:b oos:11599037748
> [>....................] sync'ed: 0.1% (11327185/11328422)M
> finish: 36:24:02 speed: 88,440 (90,796) K/sec
>
> Both two hosts are connected through 10GE.
> The underlying device is a RAID6 of 15+1 SATA disks with netto transfer rates of roughly 325-350 MB/sec.
>
> Here is my drbd.conf:
> common {
> protocol C;
>
> handlers {
> split-brain "/usr/lib/drbd/notify-split-brain.sh root";
> }
> syncer {
> rate 1150M;
> }
> }
>
> resource RAID61 {
> disk /dev/md4;
> device /dev/drbd0;
> flexible-meta-disk internal;
>
> on duosan {
> address 10.9.8.6:7788;
> }
> on monosan {
> address 10.9.8.7:7788;
> }
> }
>
> There are 4 AMD Opteron(tm) Processor 2216 cores and 4GB of RAM on each machine.
>
> Mem: 4052996k total, 930200k used, 3122796k free, 57100k buffers
> Swap: 0k total, 0k used, 0k free, 289016k cached
>
> PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
> 11121 root 20 0 0 0 0 R 53 0.0 2:07.88 drbd0_receiver
> 5514 root 15 -5 0 0 0 S 50 0.0 104:10.59 md4_raid5
> 11128 root 20 0 0 0 0 R 7 0.0 0:18.44 drbd0_asender
> 11111 root 20 0 0 0 0 S 4 0.0 0:06.36 drbd0_worker
>
> What can I do to speed it up a bit? Are there some tuning hints anywhere on the net?
>
> Thanks for the drbd.
> And a happy new year to all of you.
> Lars
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