[9fans] p9p venti sync?
I'm trying to figure out how to correctly sync a plan9port venti instance so I can start it back up again and have it actually function :-). using venti/sync doesn't appear to get the job done... Dave
Re: [9fans] p9p venti sync?
On Tue, 16 Nov 2010 14:43:20 PST David Leimbach wrote: > --0016e6464d1a9112a304953348f5 > Content-Type: text/plain; charset=ISO-8859-1 > > I'm trying to figure out how to correctly sync a plan9port venti instance so > I can start it back up again and have it actually function :-). > > using venti/sync doesn't appear to get the job done... hget http://localhost:9091/flushicache hget http://localhost:9091/flushdcache or wherever is your venti has its http port
Re: [9fans] p9p venti sync?
On Tue, Nov 16, 2010 at 5:43 PM, David Leimbach wrote: > I'm trying to figure out how to correctly sync a plan9port venti instance so > I can start it back up again and have it actually function :-). > using venti/sync doesn't appear to get the job done... It should. Not using venti/sync should work too since vac etc all sync before hanging up. The flushicache/flushdcache trick will make restarting a little faster, but it should not be necessary for correctness and shouldn't even be that much faster. Russ
Re: [9fans] p9p venti sync?
On Tuesday, November 16, 2010, Russ Cox wrote: > On Tue, Nov 16, 2010 at 5:43 PM, David Leimbach wrote: >> I'm trying to figure out how to correctly sync a plan9port venti instance so >> I can start it back up again and have it actually function :-). >> using venti/sync doesn't appear to get the job done... > > It should. Not using venti/sync should work too since > vac etc all sync before hanging up. The flushicache/flushdcache > trick will make restarting a little faster, but it should not > be necessary for correctness and shouldn't even be > that much faster. I did a kill TERM... should the signal handler have cleaned up or was I supposed to send HUP? > > Russ > >
Re: [9fans] p9p venti sync?
On Tue, Nov 16, 2010 at 10:19 PM, David Leimbach wrote: > On Tuesday, November 16, 2010, Russ Cox wrote: >> On Tue, Nov 16, 2010 at 5:43 PM, David Leimbach wrote: >>> I'm trying to figure out how to correctly sync a plan9port venti instance so >>> I can start it back up again and have it actually function :-). >>> using venti/sync doesn't appear to get the job done... >> >> It should. Not using venti/sync should work too since >> vac etc all sync before hanging up. The flushicache/flushdcache >> trick will make restarting a little faster, but it should not >> be necessary for correctness and shouldn't even be >> that much faster. > > I did a kill TERM... should the signal handler have cleaned up or was > I supposed to send HUP? There's no cleanup. The data's on disk after a sync RPC, which is what venti/sync does and also what vac does when it is done. Venti's writes are ordered so that the on-disk state is always recoverable. Because of that, there's no explicit shutdown: you just kill the server however you like. Russ
Re: [9fans] p9p venti sync?
Could sparse files be an issue? Bloom always shows up wrong when I restart. On Tuesday, November 16, 2010, David Leimbach wrote: > On Tuesday, November 16, 2010, Russ Cox wrote: >> On Tue, Nov 16, 2010 at 5:43 PM, David Leimbach wrote: >>> I'm trying to figure out how to correctly sync a plan9port venti instance so >>> I can start it back up again and have it actually function :-). >>> using venti/sync doesn't appear to get the job done... >> >> It should. Not using venti/sync should work too since >> vac etc all sync before hanging up. The flushicache/flushdcache >> trick will make restarting a little faster, but it should not >> be necessary for correctness and shouldn't even be >> that much faster. > > I did a kill TERM... should the signal handler have cleaned up or was > I supposed to send HUP? > > >> >> Russ >> >> >
Re: [9fans] p9p venti sync?
On Tue, Nov 16, 2010 at 8:09 PM, David Leimbach wrote: > Could sparse files be an issue? Bloom always shows up wrong when I > restart. > Nope... Didn't make a difference it seems. I recreated my venti setup, and it starts ok. I do a vac and an unvac, then kill it and restart and get the following: % venti/venti 2010/1116 20:44:14 venti: conf...2010/1116 20:44:14 err 4: read /Users/dave/venti/disks/bloom offset 0x0 count 65536 buf 380 returned 65536: No such file or directory venti/venti: can't load bloom filter: read /Users/dave/venti/disks/bloom offset 0x0 count 65536 buf 380 returned 65536: No such file or directory bloom is definitely there though... Not sure what the no such file or directory is referring to just yet. -rw-r--r-- 1 dave wheel 33554432 Nov 16 20:42 bloom I'll try without the bloom filter. > On Tuesday, November 16, 2010, David Leimbach wrote: > > On Tuesday, November 16, 2010, Russ Cox wrote: > >> On Tue, Nov 16, 2010 at 5:43 PM, David Leimbach > wrote: > >>> I'm trying to figure out how to correctly sync a plan9port venti > instance so > >>> I can start it back up again and have it actually function :-). > >>> using venti/sync doesn't appear to get the job done... > >> > >> It should. Not using venti/sync should work too since > >> vac etc all sync before hanging up. The flushicache/flushdcache > >> trick will make restarting a little faster, but it should not > >> be necessary for correctness and shouldn't even be > >> that much faster. > > > > I did a kill TERM... should the signal handler have cleaned up or was > > I supposed to send HUP? > > > > > >> > >> Russ > >> > >> > > >
Re: [9fans] p9p venti sync?
> > > I'll try without the bloom filter. > > Now it's working... I probably don't need this enhancement anyway, but at least it appears to be working now. Unvac of a previously generated score is working fine. Dave > >> On Tuesday, November 16, 2010, David Leimbach wrote: >> > On Tuesday, November 16, 2010, Russ Cox wrote: >> >> On Tue, Nov 16, 2010 at 5:43 PM, David Leimbach >> wrote: >> >>> I'm trying to figure out how to correctly sync a plan9port venti >> instance so >> >>> I can start it back up again and have it actually function :-). >> >>> using venti/sync doesn't appear to get the job done... >> >> >> >> It should. Not using venti/sync should work too since >> >> vac etc all sync before hanging up. The flushicache/flushdcache >> >> trick will make restarting a little faster, but it should not >> >> be necessary for correctness and shouldn't even be >> >> that much faster. >> > >> > I did a kill TERM... should the signal handler have cleaned up or was >> > I supposed to send HUP? >> > >> > >> >> >> >> Russ >> >> >> >> >> > >> > >
Re: [9fans] p9p venti sync?
> % venti/venti > 2010/1116 20:44:14 venti: conf...2010/1116 20:44:14 err 4: read > /Users/dave/venti/disks/bloom offset 0x0 count 65536 buf 380 returned > 65536: No such file or directory A read of 65536 returning 65536 should not be an error. If you want to dig in, this is $PLAN9/src/cmd/venti/srv/part.c:/^prwb. There have been problems with short reads before. Russ
Re: [9fans] p9p venti sync?
On Wed, Nov 17, 2010 at 6:36 AM, Russ Cox wrote: > > % venti/venti > > 2010/1116 20:44:14 venti: conf...2010/1116 20:44:14 err 4: read > > /Users/dave/venti/disks/bloom offset 0x0 count 65536 buf 380 returned > > 65536: No such file or directory > > A read of 65536 returning 65536 should not be an error. > If you want to dig in, this is $PLAN9/src/cmd/venti/srv/part.c:/^prwb. > There have been problems with short reads before. > > Russ > > I will look at this later tonight. It only happens when using a bloom file apparently so far. Dave
