similar to: Benchmarking

Some new features in CVS HEAD are: - v1.0 saves most of the data to dovecot.index.cache only when the client is FETCHing the messages. With mboxes the message headers are saved while parsing the mbox, which is almost the same thing. With CVS HEAD the dovecot.index.cache file is updated already when the new messages are being saved (with deliver or IMAP APPEND). This avoids reading the message

I thought I'd try benchmarking with dbmail (v2.2.4) to see how much slower a SQL backend could actually be. Skip to bottom for the conclusions. Originally I ran the tests with the databases being in XFS filesystem. MySQL's performance was horrible. It went 3-7x faster with ext3. MySQL 5.0.30 backend (innodb): ./imaptest clients=1 - append=100 seed=1 secs=30 msgs=1000000 logout=0

I cleaned up the lib-storage code a bit so that it's easier to write support for new mailbox formats. It could still use a bit of cleaning up. Anyway, I thought I'd try how easy it would be to implement Cyrus-like mail store which would consist of only Dovecot's index files and "<uid>." message files. Flags and everything else is kept only in Dovecot's index files

The biggest problem with getting v1.0 out was getting its index file code stable. v1.1 plans included doing large changes to the index file code, so it's important to get the new code stable as soon as possible. Since I've managed to stay pretty productive for the last few weeks, I've been mostly just coding the index changes. Once I'm sure that the code is again fully working

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

Hi All, We're on migration stage to a new 2-node active/active cluster with shared iSCSI storage,? everything is ready, but we are in the process of I/O testing, before we going to in production. Cluster info: 2 nodes with CentOS 7.4 balancer ( keepalived + ldirectord ), 2 dovecot directors, 2 dovecot IMAP backends, 2 Postfix SMTP, gfs2 ( corosync + dlm ), LMTP between Postfix and Dovecot

v1.1 plans have changed a bit. I'll release v1.1.alpha1 soon and hope to have a stable v1.1 in a month or two. The rest of the features that didn't make it into v1.1 will go to v1.2. I'll write more about this when v1.1 alpha is released. I also did a bit of benchmarking. v1.1's performance improvements are looking pretty great, it seems to be twice as fast as v1.0. v1.0:

Hi list, I want to test performance of dovecot-1.0.5 on OpenBSD and FreeBSD. I want to implement a small pop3s/imaps server with ~3000 users. I had tested dovecot-1.0.5 with vpopmail+mysql but I don't know if the performance is ok. Anybody have test with imaptest? OpenBSD 4.1 amd64 SMP dovecot-1.0.5 vpopmail-5.4.22 ./imaptest seed=1 secs=60 Totals: Logi List Stat Sele Fetc Fet2 Stor Dele

Hi, The measurements were created under the following conditions : ? operating system : Red Hat Enterprise Linux Server release 6.6 (Santiago) kernel in version 2.6.32-504.el6.x86_64 ? virtual server (VMware) with an Intel(R) Xeon(R) 4vCPU E5649 x 2,526 GHz (2 cores per virtual socket) and 4 GB RAM ? 7,200 RPM SATA 1TB (FC SAN IBM System Storage N3400) ? all file systems had been formated in

Hello, I'm migrating a mail server from a centos 5 cluster architecture to a centos 6 cluster architecture. The new cluster involves faster machines then the old cluster, and a virtual machine. I use dovecot-2.0.9-5.el6.x86_64, while the old cluster uses dovecot-2.0.1-1_118.el5. Tha mail server uses mysql for the users database, and a local ldap for authentication. The storage is also much

Greetings - I've now got as far as playing with the imaptest10 test utility to see if I can stress-test our development server. imaptest10 is built against dovecot-1.0rc28 It may just be that I'm excessively heavy handed, but when I let imaptest10 rip with the command... ./imaptest10 user=test%03d host=testserver.imap.york.ac.uk clients=50 mbox=./dovecot.mbox msgs=1000 secs=30

Now that I have a working kvm setup, I thought I'd finally try how Zimbra works. This is mainly some microbenchmarking, so it may not have much to do with actual performance in real life. Setup: - 1GB memory given to kvm (from host's 2GB) - Intel Core 2 6600 (kvm uses only one CPU) - CentOS 5 - 15GB qcow2 image on XFS filesystem - Zimbra 5.0 RC2 RHEL5 x86_64 - Dovecot latest hg,

Hi I'am doing some tests with nginx proxy -> dovecot using imaptest: imaptest user=user host=host pass=pass msgs=50 clients=100 Logi List Stat Sele Fetc Fet2 Stor Dele Expu Appe Logo 100% 50% 50% 100% 100% 100% 50% 100% 100% 100% 100% 30% 5% 41 19 10 36 24 39 9 13 11 8 12 100/100 10 12 11 17 24 31 3

Hi list, I try to run imaptest, but I get the following errors (as root): # ./imaptest copybox=Trash # or any other command in http://www.imapwiki.org/ImapTest/Examples Logi List Stat Sele Fetc Fet2 Copy Stor Dele Expu Appe Logo 100% 50% 50% 100% 100% 100% 33% 50% 100% 100% 100% 100% 30% 5% 5% 0 0 0 0 0 0 0 0 0 0

dovecot-1.1.beta16]# gcc imaptest.c -o imaptest -g -Wall -W -I. -Isrc/lib-mail -Isrc/lib -Isrc/lib-imap -Isrc/lib-storage/index/mbox -DHAVE_CONFIG_H src/lib-storage/index/mbox/mbox-from.o src/lib-imap/libimap.a src/lib-mail/libmail.a src/lib/liblib.a imaptest.c: In client_append function: imaptest.c:1492: error: too many arguments for i_stream_create_limit function

http://hg.dovecot.org/dovecot-dbox-redesign/ Looks like multi-dbox scales pretty nicely. Even after 100k messages the peak saved msgs/sec is the same as the initial saved msgs/sec, even if the average slows down somewhat. I tested this by first deleting mailbox, then running "imaptest" for a second to get saving to start writing several fields to dovecot.index.cache file. Then ran

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hello, in order to stress my Dovecot test installation a bit, I compiled imaptest10.c. Now and then I see: Logi List Stat Sele Fetc Fet2 Copy Stor Dele Expu Appe Logo 100% 50% 50% 100% 100% 100% 33% 50% 100% 100% 100% 100% 30% 5% 5% 0 0 0 0 0 0 0 0 0 0 0 0 1/

http://dovecot.org/patches/1.1/maildir-dirty-syncs.diff This patch adds a new maildir_very_dirty_syncs setting. If set to "yes", Dovecot assumes it's the only one changing the cur/ directory (so other MDAs can add mails to new/ without problems). This makes it possible to avoid rescanning the cur/ directory all the time looking for filenames. It also looks like (in stress testing)

mdbox format is a cross between mbox and sdbox. The idea is that it keeps up to mdbox_rotate_size sized mbox files which contain mails. Using zlib here will not help, because zlib is not applied to the full mdbox file, but individual mails within. Also not sure why you think that adding compression would make things faster? =) I am not fully sure how cephfs works but you might get better

I just changed Dovecot v1.1 code to work much more nicely when appending new messages to large mailboxes. Dovecot hg (cydir format, fsync_disable=yes): ./imaptest secs=1 ./imaptest - append=100,0 logout=0 msgs=10000000 clients=1 seed=1 secs=300 Logi Sele Appe 100% 100% 100% 1 1 2322 1/ 1 0 0 1998 1/ 1 0 0 2293 1/ 1 0 0 2009 1/ 1 0 0 1789 1/ 1 0