similar to: mdbox compression

Hi, I don''t know if this has been discussed before, but have you thought about adding LZO compression to ZFS? One zfs-fuse user has provided a patch which implements LZO compression, and he claims better compression ratios *and* better speed than lzjb. The miniLZO library is licensed under the GPL, but the author specifically says that other licenses are available by request. Has this

Hi, I just installed 2009.06 and found that compression isn''t enabled by default when filesystems are created. Does is make sense to have an RFE open for this? (I''ll open one tonight if need be.) We keep telling people to turn on compression. Are there any situations where turning on compression doesn''t make sense, like rpool/swap? what about rpool/dump? Thanks, ~~sa

Hello All, I am running NTFS over iSCSI on a ZFS ZVOL volume with compression=gzip-9 and blocksize=8K. The server is 2 core P4 3.0 Ghz with 5 GB of RAM. Whenever I start copying files from Windows onto the ZFS disk, after about 100-200 Mb been copied the server starts to experience freezes. I have iostat running, which freezes as well. Even pings on both of the network adapters are reporting

Hello, I am using dovecot with mdbox+sis and I notice an ever increasing disk space usage since I converted mailboxes from Maildir to mdboxes. I have checked with a user and while it actually uses only 65K, his mdbox files on disk are more than 6G. The backup of his mailbox is just 64K. Any suggestions ? Below are some relevant commands: [root at mail ~]# doveadm quota get -u test Quota

Yes I have done it, it is the third command I have run, without any change. a. On 02/04/2015 09:53 ??, Urban Loesch wrote: > Did you "purged" the deleted mails for this user? > On mdbox you must run "doveadm purge -u $USER" to whipe out any as deleted marked mails etc. > > Details: http://wiki2.dovecot.org/Tools/Doveadm/Purge > > I use a nightly cronjob wor

Shot in the dark here...haven't tried it myself so no promises. There's probably a much better way to do this but sometimes a little "brute force" helps. Theoretical steps: 1. Stop all mail processes - both SMTP and IMAP. 2. Use "doveadm sync" to backup the user mailbox, e.g., doveadm backup -u user mdbox:/tmp/usermail 3. Verify /tmp/usermail looks reasonable

I have a namespace with mbox and a namespace with mdbox mailboxes. How do I only enable the compression for the mdbox mailboxes?

Currently there is no way to enable compression per namespace. Aki On 10.1.2019 23.51, Marc Roos wrote: > Like mentioned here > https://www.dovecot.org/pipermail/dovecot/2013-March/089084.html > > > > I have a namespace with mbox and a namespace with mdbox mailboxes. How > do I only enable the compression for the mdbox mailboxes? > > > > > > >

I'm using "/usr/bin/doveadm purge -A" to purge the mdboxes of my users. Unfortunately this command terminates prematurely once it reaches a defective mdbox! Is there a workaround for this? Like using doveadm to get a list of valid users and then run "doveadm purge -u" on each of those? -- [*] sys4 AG http://sys4.de, +49 (89) 30 90 46 64 Franziskanerstra?e 15, 81669

Yesterday I had to recover an e-mail which a user had deleted. If I understand this correctly the message was expunged but not purged (doveadm purge had not been run). This e-mail was clearly still in the mdbox stored with zlib compression as I could tell using the doveadm dump command (doveadm dump -t dbox filename). I could however not reveal the e-mail with the normal doveadm fetch -u

Hello zfs-discuss, Is someone actually working on it? Or any other algorithms? Any dates? -- Best regards, Robert mailto:rmilkowski at task.gda.pl http://milek.blogspot.com

Adam, With the blog entry[1] you''ve made about gzip for ZFS, it raises a couple of questions... 1) It would appear that a ZFS filesystem can support files of varying compression algorithm. If a file is compressed using method A but method B is now active, if I truncate the file and rewrite it, is A or B used? 2) The question of whether or not to use bzip2 was raised in the

> On 10/11/2020 20:07 Daniel Sch?tze <dms at cwa.uk.com> wrote: > > > Dear Aki > Thank you. Unfortunately I'm struggling to get the right syntax for this as it looks like someone else was here too > https://dovecot.org/pipermail/dovecot/2018-July/112441.html > The location in my dovecot.conf is > >

Hi, I have a "ubuntu10.04 + ext4-filesystem + dovecot-2.0.13 +mdbox" configuration in my server. It works fine with ~50k accounts. Recently happened a filesystem corruption in a device of StMailLocation and I fix with fsck.ext4. After this crash, one account began to show access timeout and errors like this on force-resync: # doveadm force-resync -u account INBOX doveadm(account):

Hello. I want to know what is the unit of compression in ZFS. Is it 4 KB or larger? Is it tunnable? Thanks. Thanos -- This message posted from opensolaris.org

I just had a quick play with gzip compression on a filesystem and the result was the machine grinding to a halt while copying some large (.wav) files to it from another filesystem in the same pool. The system became very unresponsive, taking several seconds to echo keystrokes. The box is a maxed out AMD QuadFX, so it should have plenty of grunt for this. Comments? Ian

Hi, I have recently migrated (under emergency conditions) a dovecot imap/pop based server to a new instance. The mailboxes used mdbox format and due to various screwups I had corrupt indexes. I thought I'd cleaned this up but then I found that this new instance hadn't been set up correctly for nfs. Long story short, I still get users with new cases of corrupt indexes. The symptom is imap

Hi Guys, I've been desperately trying to find some comparative performance information about the different mailbox formats supported by Dovecot in order to make an assessment on which format is right for our environment. This is a brand new build, with customer mailboxes to be migrated in over the course of 3-4 months. Some details on our new environment: * Approximately 1.6M+

Hello, we are using doveadm sync to export mdbox to maildir format, so we can use an external tool to convert into an pst file. Since we have enabled zlib compression doveadm sync always exports the maildir gzip compressed. Are there any ways to prevent the doveadm sync to export the maildir compressed ? Have tried this: doveadm -o "maildir_copy_with_hardlinks=no" sync -u imap at

Hello We are using Dovecot 2.0.17 with mdbox+zlib and we are evaluating alternative storage. These are the relevant settings mdbox_rotate_interval = 1d mdbox_rotate_size=60m [...] zlib_save_level = 9 # 1..9 zlib_save = gz # or bz2 [...] zlib plugin enabled in dovecot-lda These are my questions: 1? General mdbox question. We are happy usings zlib_save, but we would like to try bzip2