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...4.9.0-12-amd64 #1 SMP Debian 4.9.210-1 (2020-01-20) x86_64 GNU/Linux > > RAID is a composition of 16 harddrives. Harddrives are connected via AVAGO MegaRAID SAS 9361-8i as a RAID-0 devices. All harddrives are SAS 2.5" 15k drives. > > Server serves as a IMAP with Dovecot 2.2.27-3+deb9u6, 4104 accounts, Mailbox format, LMTP delivery. does "Mailbox format" mean mbox? If so, then there is your bottleneck. mbox is the slowest possible mailbox format there is. Sami

...ame -a Linux imap 4.9.0-12-amd64 #1 SMP Debian 4.9.210-1 (2020-01-20) x86_64 GNU/Linux RAID is a composition of 16 harddrives. Harddrives are connected via AVAGO MegaRAID SAS 9361-8i as a RAID-0 devices. All harddrives are SAS 2.5" 15k drives. Server serves as a IMAP with Dovecot 2.2.27-3+deb9u6, 4104 accounts, Mailbox format, LMTP delivery. We run 'rsync' to remote NAS daily. It takes about 6.5 hours to finish, 12'265'387 files last night. Last half year, we encoutered into performace troubles. Server load grows up to 30 in rush hours, due to IO waits. We tried to at...

...4 #1 SMP Debian 4.9.210-1 (2020-01-20) x86_64 GNU/Linux >> >> RAID is a composition of 16 harddrives. Harddrives are connected via AVAGO MegaRAID SAS 9361-8i as a RAID-0 devices. All harddrives are SAS 2.5" 15k drives. >> >> Server serves as a IMAP with Dovecot 2.2.27-3+deb9u6, 4104 accounts, Mailbox format, LMTP delivery. > > does "Mailbox format" mean mbox? > > If so, then there is your bottleneck. mbox is the slowest possible mailbox format there is. > > Sami Sorry, no, it is a typo. We are using "Maildir". "doveconf -a&...

...post the output of "cat /proc/mdstat" or since you say you're using btrfs, are you using their own RAID0 setup? If so, please post the output of 'btrfs stats' or whatever the command is you use to view layout info? Miloslav> Server serves as a IMAP with Dovecot 2.2.27-3+deb9u6, 4104 accounts, Miloslav> Mailbox format, LMTP delivery. How ofter are these accounts hitting the server? Miloslav> We run 'rsync' to remote NAS daily. It takes about 6.5 hours to finish, Miloslav> 12'265'387 files last night. That's.... sucky. So basically you&...

...l reasons: - easy to increase a capacity - easy to replace drives by larger ones - due to checksuming, btrfs does not need fsck in case of power failure - btrfs scrub discovers failing drive sooner than S.M.A.R.T. or RAID controller > Miloslav> Server serves as a IMAP with Dovecot 2.2.27-3+deb9u6, 4104 accounts, > Miloslav> Mailbox format, LMTP delivery. > > How ofter are these accounts hitting the server? IMAP serves for a univesity. So there are typical rush hours from 7AM to 3PM. Lowers during the evening, almost not used during the night. > Miloslav> We run 'r...

...-winbind:amd64 (2:4.5.12+dfsg-2+deb9u4) ... Removing winbind (2:4.5.12+dfsg-2+deb9u4) ... Purging configuration files for winbind (2:4.5.12+dfsg-2+deb9u4) ... Processing triggers for man-db (2.7.6.1-2) ... Processing triggers for libc-bin (2.24-11+deb9u3) ... Processing triggers for systemd (232-25+deb9u6) ... But after install I got the same error. That is actually a good thing, on a Samba AD DC you ONLY start the > 'samba' binary. This is achieved on Debian by 'systemctl > start samba-ad-dc', the 'samba' binary will then start 'smbd' & > 'winbind&...

...l reasons: - easy to increase a capacity - easy to replace drives by larger ones - due to checksuming, btrfs does not need fsck in case of power failure - btrfs scrub discovers failing drive sooner than S.M.A.R.T. or RAID controller > Miloslav> Server serves as a IMAP with Dovecot 2.2.27-3+deb9u6, 4104 accounts, > Miloslav> Mailbox format, LMTP delivery. > > How ofter are these accounts hitting the server? IMAP serves for a univesity. So there are typical rush hours from 7AM to 3PM. Lowers during the evening, almost not used during the night. > Miloslav> We run 'r...

...ba core libraries ii samba-vfs-modules:amd64 2:4.10.6+nmu-1.1deb9~1 amd64 Samba Virtual FileSystem plugins ii smbclient 2:4.10.6+nmu-1.1deb9~1 amd64 command-line SMB/CIFS clients for Unix ii ssh-krb5 1:7.4p1-10+deb9u6 all secure shell client and server (transitional package) ii winbind 2:4.10.6+nmu-1.1deb9~1 amd64 service to resolve user and group information from Windows NT servers ii xattr 0.9.1-1...

...av> - easy to replace drives by larger ones Miloslav> - due to checksuming, btrfs does not need fsck in case of power failure Miloslav> - btrfs scrub discovers failing drive sooner than S.M.A.R.T. or RAID Miloslav> controller Miloslav> Server serves as a IMAP with Dovecot 2.2.27-3+deb9u6, 4104 accounts, Miloslav> Mailbox format, LMTP delivery. >> How ofter are these accounts hitting the server? Miloslav> IMAP serves for a univesity. So there are typical rush hours from 7AM to Miloslav> 3PM. Lowers during the evening, almost not used during the night. I can unders...

I've summerized a bit.. And i saw Rowland also answered already. Below is anonimized, but it shows, 2 completely different server setups. I really suggest you setup your AD-DC's the same. To summ up. DC1 Samba is running as an AD DC but 'winbindd' is NOT running. You running SSSD on the AD-DC, which is not supported. Your using a really out-dated OS.. The hosts is not

...4 #1 SMP Debian 4.9.210-1 (2020-01-20) x86_64 GNU/Linux >> >> RAID is a composition of 16 harddrives. Harddrives are connected via AVAGO MegaRAID SAS 9361-8i as a RAID-0 devices. All harddrives are SAS 2.5" 15k drives. >> >> Server serves as a IMAP with Dovecot 2.2.27-3+deb9u6, 4104 accounts, Mailbox format, LMTP delivery. > > does "Mailbox format" mean mbox? > > If so, then there is your bottleneck. mbox is the slowest possible mailbox format there is. > > Sami Sorry, no, it is a typo. We are using "Maildir". "doveconf -a&...

Am 12.01.2019 um 23:08 schrieb Rowland Penny via samba: > On Sat, 12 Jan 2019 22:04:50 +0100 > Anton Blau via samba <samba at lists.samba.org> wrote: > > Is this all you installed ? : > apt-get install samba > > If so try reading this: > > https://wiki.samba.org/index.php/Distribution-specific_Package_Installation > > Hello Rowland, thank you for your help.

...es > ii samba-vfs-modules:amd64 2:4.10.6+nmu-1.1deb9~1 amd64 Samba Virtual FileSystem plugins > ii smbclient 2:4.10.6+nmu-1.1deb9~1 amd64 command-line SMB/CIFS clients for Unix > ii ssh-krb5 1:7.4p1-10+deb9u6 all secure shell client and server (transitional package) > ii winbind 2:4.10.6+nmu-1.1deb9~1 amd64 service to resolve user and group information from Windows NT servers > ii xattr 0.9.1-1...

https://bugs.freedesktop.org/show_bug.cgi?id=93629 Bug ID: 93629 Summary: [NVE6] complete system freeze, PGRAPH engine fault on channel 2, SCHED_ERROR [ CTXSW_TIMEOUT ] Product: xorg Version: unspecified Hardware: x86-64 (AMD64) OS: Linux (All) Status: NEW Severity: normal