Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
Hello
On Tue, Jan 20, 2004 at 12:51:28PM +0100, Lars Ellenberg wrote:
> > I used to have 2.4.23 and drbd 0.6.4 running on two servers sharing
> > 2x 5GB over a 100MBit crosslink.
> >
> > Now I upgraded to 2.4.24 and drbd 0.6.10 and two Intel e1000.o gigabit
> > cards and my syncall time drops from about 15mins to more than 1h!
> >
> > After the syncinc was done, I tested the link with "rsync -v -a
> > --progress ..." and got at least 15MB/s = 120MBit/s which is not much
> > for a 1000MBit/s link but at least more than 2MBit/s that drbd got!
> >
> > Below you find the "cat /proc/drbd" and the "drbdsetup /dev/nb0 show"
> > outputs. The sync-max values differ a bit as I played around before
> > giving up...
...
> > sync-min = 200 KB/sec
> you should increase sync-min !!
> > sync-max = 5000 KB/sec
> of course you want to increase sync-max again...
> > sync-nice = 10
> you should probably sync-nice = -10 or so
And so I did. I also changed the devices MTU size to 5000 and verified
with iptraf that this large packet size is actually used. It is.
I could rsync a 100MB file over the very same crossover cable with
15MB/s and the servers are quite idle according to vmstat :-(
But the syncAll still is no bit faster!
bye,
-christian-
root at mail3b:~# cat /proc/drbd
version: 0.6.10 (api:64/proto:62)
0: cs:SyncingAll st:Secondary/Primary ns:0 nr:1435652 dw:1435652 dr:0 pe:0 ua:15
[=====>..............] sync'ed: 26.8% (3668/5004)M
finish: 0:47:57h speed: 1,319 (1,313) K/sec
1: cs:SyncingAll st:Secondary/Primary ns:0 nr:1367248 dw:1367248 dr:0 pe:0 ua:15
[=====>..............] sync'ed: 26.7% (3672/5004)M
finish: 0:47:40h speed: 1,336 (1,310) K/sec
root at mail3a:~# drbdsetup /dev/nb0 show <--- same value on both hosts
Lower device: 08:07 (/dev/sda7) and both partitions.
Disk options:
disk-size = 5124703 KB
do-panic
Local address: 10.10.10.1:7788
Remote address: 10.10.10.2:7788
Wire protocol: C
Net options:
timeout = 6.0 sec
tl-size = 5000
connect-int = 10 sec
ping-int = 10 sec
sndbuf-size = 131070
sync-min = 100000 KB/sec
sync-max = 122070 KB/sec
sync-nice = -10
--
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