Re: [DRBD-user] Dual-primary/ Very slow synchronization

2011-05-20 Thread Daniel Meszaros
Hi! Am 19.05.2011 21:16, schrieb Digimer: As Felix stated, try 10M. If it get's up to that speed (and it can take a while, be patient), then bump it to 20M, etc. I tried syncing with 10M last night and indeed it became faster than before and was around 10MB/s. Using "drbdsetup /dev/drbd0 sync

Re: [DRBD-user] Dual-primary/ Very slow synchronization

2011-05-20 Thread Lars Ellenberg
On Fri, May 20, 2011 at 10:12:29AM +0200, Daniel Meszaros wrote: > Hi! > > Am 19.05.2011 21:16, schrieb Digimer: > >As Felix stated, try 10M. If it get's up to that speed (and it can take > >a while, be patient), then bump it to 20M, etc. > > I tried syncing with 10M last night and indeed it beca

Re: [DRBD-user] Dual-primary/ Very slow synchronization

2011-05-20 Thread Felix Frank
On 05/20/2011 10:12 AM, Daniel Meszaros wrote: > I tried syncing with 10M last night and indeed it became faster than > before and was around 10MB/s. Using "drbdsetup /dev/drbd0 syncer -r 20M" > and so on I could increase the sync speed up to 70M ... then it > interrupted and a new bitmap check sta

Re: [DRBD-user] Dual-primary/ Very slow synchronization

2011-05-20 Thread Daniel Meszaros
Am 20.05.2011 10:23, schrieb Felix Frank: On 05/20/2011 10:12 AM, Daniel Meszaros wrote: I tried syncing with 10M last night and indeed it became faster than before and was around 10MB/s. Using "drbdsetup /dev/drbd0 syncer -r 20M" and so on I could increase the sync speed up to 70M ... then it i

[DRBD-user] the perfomance issuce with a physical volume synchronization

2011-05-20 Thread Junko IKEDA
Hi, We are trying to configure a DRBD resource as a Physical Volume, using examples from the following document. http://www.drbd.org/users-guide/s-lvm-drbd-as-pv.html DRBD works well, but there are some perfomance problems. We run "dd" like thie; # dd if=/dev/zero of=/mnt/dd/10GB.dat bs=1M count=

Re: [DRBD-user] the perfomance issuce with a physical volume synchronization

2011-05-20 Thread Lars Ellenberg
On Fri, May 20, 2011 at 05:32:52PM +0900, Junko IKEDA wrote: > Hi, > > We are trying to configure a DRBD resource as a Physical Volume, using > examples from the following document. > http://www.drbd.org/users-guide/s-lvm-drbd-as-pv.html > > DRBD works well, but there are some perfomance problems

[DRBD-user] Performance question

2011-05-20 Thread Jan.Dreyer
Hi, I have a question that is not directly related to drbd, but more to performance of drbd on HW-Raid. This is our configuration: 2 HP machines with ubuntu-Linux (LTS) configured HW Raid5 on 4 disks (DG146BB976 = 146.8GB 10k SAS) on each of the two machines LVM on that HW-RAID with 3 logical

Re: [DRBD-user] Performance question

2011-05-20 Thread Pascal BERTON
Hi Jan ! This is a tough question. It depends on many parameters, starting with the size of the requested IOs. There are a couple of good articles on the net talking about that, including these : - 2 from Scott LOWE, wich are fairly clear and interesting from the IOPS estimation metho

[DRBD-user] Xenserver 5.6 SP2 working with DRBD, was: Xenserver 5.6 FP 1 DRBD crash

2011-05-20 Thread Alex Kuehne
Quoting Alex Kuehne : Quoting Lars Ellenberg : On Tue, Jan 11, 2011 at 04:58:46PM +0100, Alex Kuehne wrote: Quoting Lars Ellenberg : On Mon, Jan 10, 2011 at 04:07:12PM +0100, Alex Kuehne wrote: Quoting Alex Kuehne : Hi guys, This is another report of DRBD not working with Xenserver 5.6

Re: [DRBD-user] Dual-primary/ Very slow synchronization

2011-05-20 Thread Daniel Brockmann
Am 20.05.2011 10:22, schrieb Lars Ellenberg: According to you, it "had been working" before with the exact same hardware and configuration. Now if it does not anymore, then I strongly suspect network problems. Did you do some network benchmarks on the replication link recently? Packet loss, exc

Re: [DRBD-user] 4TB limit

2011-05-20 Thread Lionel Sausin
Le -10/01/-28163 20:59, Mikael Andersson a écrit : >> We're running v8.3.7, though this cluster has been upgraded to 8.3.10 for a >> short while and then downgraded back, but the resources were created with >> 8.3.7. > Why did you downgrade? Any problems with 8.3.10? Not really: I was test-driving

Re: [DRBD-user] the perfomance issuce with a physical volume synchronization

2011-05-20 Thread Junko IKEDA
Hi, > DRBD version, LVM version, Device mapper version (kernel version), > distribution? DRBD version 8.3.10(we noticed this with 8.3.5 at first, and update DRBD after that) LVM version LVM2(included RHEL in 5.2) kernel version 2.6.18-92.EL5 (x86_64） distribution RHEL 5.2 > What about oflag=d

Re: [DRBD-user] Restarting IPtables caused split-brain and, OCFS2 corruption?

2011-05-20 Thread Herman Lau
Andreas Hofmeister wrote: On 17.05.2011 18:19, Herman wrote: I made a change to IPTables, and did a "service iptables restart", and next thing I knew, I had a split brain. I would guess that the RHEL FW setup flushes the connection tracking tables and has a default drop (or reject) rule.

Re: [DRBD-user] Sudden high CPU load [SOLVED]

2011-05-20 Thread Richard Stockton
Hi Felix, At 12:38 AM 5/19/2011, you wrote: On 05/18/2011 10:02 PM, Richard Stockton wrote: >> Is NFS mounted sync or async? > > NFS is mounted "sync" (NFS3 default, I believe). This is very bad. Do use async, it's not as asynchronous as the name implies (except if you run applications that rel