similar to: dovecot Digest, Vol 93, Issue 41

We have done some benchmarking tests using dovecot 2.0.12 to find the best shared filesystem for hosting many users, here I share with you the results, notice the bad perfomance of all the shared filesystems against the local storage. Is there any specific optimization/tunning on dovecot for use GFS2 on rhel6??, we have configured the director to make the user mailbox persistent in a node, we will

Great information, thank you. Could you remark on GPFS services hosting mail storage over a WAN between two geographically separated data centers? ----- Reply message ----- From: "Jan-Frode Myklebust" <janfrode at tanso.net> To: "Stan Hoeppner" <stan at hardwarefreak.com> Cc: "Timo Sirainen" <tss at iki.fi>, <dovecot at dovecot.org> Subject:

Two web servers, both virtualized with CentOS Xen servers as host (residing on two different physical servers). GFS used to store home directories containing web document roots. Shared block device used by GFS is an ISCSI target with the ISCSI initiator residing on the Dom-0, and presented to Dom-U webservers as drives. Also, providing a second shared block device for quorum disk. If I hit the

Taking a survey. 1. How many of you have a remote site hot backup Dovecot IMAP server? 2. How are you replicating mailbox data to the hot backup system? A. rsync B. DRBD+GFS2 C. Other Thanks. -- Stan

Hello everyone, I am currently running Dovecot as a high performance solution to a particular kind of problem. My userbase is small, but it murders email servers. The volume is moderate, but message retention requirements are stringent, to put it nicely. Many users receive a high volume of email traffic, but want to keep every message, and *search* them. This produces mail accounts up to

Hello All, We are using Dovecot 1.1.3 to serve IMAP on a pair of clustered Postfix servers which share a fiber array via the GFS clustered filesystem. This all works very well for the most part, with the exception that certain operations are so inefficient on GFS that they generate significant I/O load and hurt performance. We are using the Maildir format on disk. We're also using

Hello, I'm deploing a new email cluster using Dovecot over GFS2. Actually I'm using courier over GFS. Actually I'm testing Dovecot with these parameters: mmap_disable = yes mail_fsync = always mail_nfs_storage = yes mail_nfs_index = yes lock_method = fcntl Are they correct? RedHat GFS support mmap, so is it better to enable it or leave it disabled? The documentation suggest the

Hello list, we continue our tests using Dovecot on a RHEL 6.1 Cluster Backend with GFS2, also we are using dovecot as a Director for user node persistence, everything was ok until we started stress testing the solution with imaptest, we had many deadlocks, cluster filesystems corruptions and hangs, specially in index filesystem, we have configured the backend as if they were on a NFS like setup

Hello, maybe there is someone they can help and answer a question why i get these network screen on my ctdb clusters. I have two ctdb clusters. One physical and one in a vmware enviroment. So when i transfer any files (copy) in a samba share so i get such network curves with performance breaks. I dont see that the transfer will stop but why is that so? can i change anything or does anybody know

I am trying to get up geo replication between two gluster volumes I have set up two replica 2 arbiter 1 volumes with 9 bricks [root at gfs1 ~]# gluster volume info Volume Name: gfsvol Type: Distributed-Replicate Volume ID: c2fb4365-480b-4d37-8c7d-c3046bca7306 Status: Started Snapshot Count: 0 Number of Bricks: 3 x (2 + 1) = 9 Transport-type: tcp Bricks: Brick1: gfs2:/gfs/brick1/gv0 Brick2:

I've tested all these filesystems here: http://rwmj.wordpress.com/2009/11/08/filesystem-metadata-overhead/ -- Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones virt-top is 'top' for virtual machines. Tiny program with many powerful monitoring features, net stats, disk stats, logging, etc. http://et.redhat.com/~rjones/virt-top -------------- next part

Hello: I am planning to implement GFS for my university as a summer project. I have 10 servers each with SAN disks attached. I will be reading and writing many files for professor's research projects. Each file can be anywhere from 1k to 120GB (fluid dynamic research images). The 10 servers will be using NIC bonding (1GB/network). So, would GFS be ideal for this? I have been reading a lot

I am trying to use dovecot. I've got a GFS2 shared volume on two servers with dovecot running on both. On one server at a time, it works. The test I am trying is to attach two mail programs (MUA) via IMAPS (Thunderbird and Evolution as it happens). I've attached one mail program to each IMAPS server. I am trying to move emails around in one program (from folder to folder), and then

Dear Srs, I get this error when running "mkfs.ocfs2": ================================================================================= # mkfs.ocfs2 -b 4K -C 32K -N 255 -L backup_ocfs2_001 /dev/sdb1 mkfs.ocfs2 1.2.7 Filesystem label=backup_ocfs2_001 Block size=4096 (bits=12) Cluster size=32768 (bits=15) Volume size=6000488677376 (183120382 clusters) (1464963056 blocks) 5678 cluster

Hi. The short story... Rush job, never done clustered file systems before, vlan didn't support multicast. Thus I ended up with drbd working ok between the two servers but cman / gfs2 not working, resulting in what was meant to be a drbd primary/primary cluster being a primary/secondary cluster until the vlan could be fixed with gfs only mounted on the one server. I got the single server

Hi all, If you have had experience hosting GFS/GFS2 on CentOS machines could you share you general impression on it? Was it realiable? Fast? Any issues or concerns? Also, how feasible is it to start it on just one machine and then grow it out if necessary? Thanks. Boris.

Optimizations by reducing the STREQ operations and do some code cleanup. Signed-off-by: Wanlong Gao <gaowanlong at cn.fujitsu.com> --- daemon/mkfs.c | 29 +++++++++++++---------------- 1 files changed, 13 insertions(+), 16 deletions(-) diff --git a/daemon/mkfs.c b/daemon/mkfs.c index a2c2366..7757623 100644 --- a/daemon/mkfs.c +++ b/daemon/mkfs.c @@ -44,13 +44,16 @@ do_mkfs_opts (const

Hi everybody, I have tested CTDB+GFS2+CMAN under Debian. It works good but I do not understand some points. It is possible to run the CTDB defining it under services section in cluster.conf but running it on the second node shuts down the process at the first one. My CTDB configuration implies 2 active-active nodes. Does CTDB care if the node starts with clean_start="0" or

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Hi all, Where i want to arrive: 1) having two storage server replicating partition with DRBD 2) exporting via GNBD from the primary server the drbd with GFS2 3) inporting the GNBD on some nodes and mount it with GFS2 Assuming no logical error are done in the last points logic this is the situation: Server 1: LogVol09, DRDB configured as /dev/drbd0 replicated to Server 2. DRBD seems to work