Re: [zfs-discuss] Fixing txg commit frequency

2012-01-06 Thread Sašo Kiselkov
On 07/01/2011 12:01 AM, Sašo Kiselkov wrote: On 06/30/2011 11:56 PM, Sašo Kiselkov wrote: Hm, it appears I'll have to do some reboots and more extensive testing. I tried tuning various settings and then returned everything back to the defaults. Yet, now I can ramp the number of concurrent

Re: [zfs-discuss] Fixing txg commit frequency

2011-06-30 Thread Jim Klimov
2011-06-30 11:47, Sašo Kiselkov пишет: On 06/30/2011 02:49 AM, Jim Klimov wrote: 2011-06-30 2:21, Sašo Kiselkov пишет: On 06/29/2011 02:33 PM, Sašo Kiselkov wrote: Also there is a buffer-size limit, like this (384Mb): set zfs:zfs_write_limit_override = 0x1800 or on command-line like

Re: [zfs-discuss] Fixing txg commit frequency

2011-06-30 Thread Sašo Kiselkov
On 06/30/2011 01:10 PM, Jim Klimov wrote: 2011-06-30 11:47, Sašo Kiselkov пишет: On 06/30/2011 02:49 AM, Jim Klimov wrote: 2011-06-30 2:21, Sašo Kiselkov пишет: On 06/29/2011 02:33 PM, Sašo Kiselkov wrote: Also there is a buffer-size limit, like this (384Mb): set zfs:zfs_write_limit_override

Re: [zfs-discuss] Fixing txg commit frequency

2011-06-30 Thread Jim Klimov
2011-06-30 15:22, Sašo Kiselkov пишет: I tried increasing this value to 2000 or 3000, but without an effect - prehaps I need to set it at pool mount time or in /etc/system. Could somebody with more knowledge of these internals please chime in? And about this part - it was my understanding

Re: [zfs-discuss] Fixing txg commit frequency

2011-06-30 Thread Sašo Kiselkov
On 06/30/2011 01:33 PM, Jim Klimov wrote: 2011-06-30 15:22, Sašo Kiselkov пишет: I tried increasing this value to 2000 or 3000, but without an effect - prehaps I need to set it at pool mount time or in /etc/system. Could somebody with more knowledge of these internals please chime in?

Re: [zfs-discuss] Fixing txg commit frequency

2011-06-30 Thread Sašo Kiselkov
On 06/30/2011 11:56 PM, Sašo Kiselkov wrote: On 06/30/2011 01:33 PM, Jim Klimov wrote: 2011-06-30 15:22, Sašo Kiselkov пишет: I tried increasing this value to 2000 or 3000, but without an effect - prehaps I need to set it at pool mount time or in /etc/system. Could somebody with more

Re: [zfs-discuss] Fixing txg commit frequency

2011-06-29 Thread Jim Klimov
2011-06-29 16:33, Sašo Kiselkov пишет: On 06/27/2011 11:59 AM, Jim Klimov wrote: I'd like to ask about whether there is a method to enforce a certain txg commit frequency on ZFS. Well, there is a timer frequency based on TXG age (i.e 5 sec by default now), in /etc/system like this: set

Re: [zfs-discuss] Fixing txg commit frequency

2011-06-29 Thread Sašo Kiselkov
On 06/29/2011 02:33 PM, Sašo Kiselkov wrote: Also there is a buffer-size limit, like this (384Mb): set zfs:zfs_write_limit_override = 0x1800 or on command-line like this: # echo zfs_write_limit_override/W0t402653184 | mdb -kw Currently my value for this is 0. How should I set it? I'm

Re: [zfs-discuss] Fixing txg commit frequency

2011-06-29 Thread Sašo Kiselkov
On 06/27/2011 11:59 AM, Jim Klimov wrote: I'd like to ask about whether there is a method to enforce a certain txg commit frequency on ZFS. Well, there is a timer frequency based on TXG age (i.e 5 sec by default now), in /etc/system like this: set zfs:zfs_txg_synctime = 5 When

Re: [zfs-discuss] Fixing txg commit frequency

2011-06-27 Thread Jim Klimov
I'd like to ask about whether there is a method to enforce a certain txg commit frequency on ZFS. Well, there is a timer frequency based on TXG age (i.e 5 sec by default now), in /etc/system like this: set zfs:zfs_txg_synctime = 5 Also there is a buffer-size limit, like this (384Mb):

Re: [zfs-discuss] Fixing txg commit frequency

2011-06-26 Thread Richard Elling
On Jun 24, 2011, at 5:29 AM, Sašo Kiselkov wrote: Hi All, I'd like to ask about whether there is a method to enforce a certain txg commit frequency on ZFS. I'm doing a large amount of video streaming from a storage pool while also slowly continuously writing a constant volume of data to

Re: [zfs-discuss] Fixing txg commit frequency

2011-06-26 Thread Sašo Kiselkov
On 06/26/2011 06:17 PM, Richard Elling wrote: On Jun 24, 2011, at 5:29 AM, Sašo Kiselkov wrote: Hi All, I'd like to ask about whether there is a method to enforce a certain txg commit frequency on ZFS. I'm doing a large amount of video streaming from a storage pool while also slowly

[zfs-discuss] Fixing txg commit frequency

2011-06-24 Thread Sašo Kiselkov
Hi All, I'd like to ask about whether there is a method to enforce a certain txg commit frequency on ZFS. I'm doing a large amount of video streaming from a storage pool while also slowly continuously writing a constant volume of data to it (using a normal file descriptor, *not* in O_SYNC). When