On Freitag, 11. Dezember 2009 Josh Marshall wrote: > I have found that since linux kernel 2.6 series, LVM snapshots have > caused system lockups. I used it happily in the 2.4 series.
That's why LVM snapshots are not used in XenServer 5.x. They also said it's unstable, especially under high load. > Besides > that, I did mention *impact-free*. Adding a snapshot and reading from > a snapshot severely impacts the speed of the running system. I totally agree with your arguing. Having all together is much easier to administer. Once it's too slow, I'll throw in more hardware. It's cheaper to throw in a new server than to have the extra burden with redundancy, backup/restore, etc... So far, I haven't seen a limit on dbmail, while we had limits with older POP-only systems before, where users had the setting "leave mail on server". The server had to copy the flat file all over again for each user, I/O stalled... BTW: we upgraded from PostgreSQL 8.1 to 8.3, which exactly *doubled* the speed of our nightly backups and vacuum/cluster runs. So that was a nice step which I can recommend to everybody. I wonder if 8.4 will bring another improvement. mfg zmi -- // Michael Monnerie, Ing.BSc ----- http://it-management.at // Tel: 0660 / 415 6531 .network.your.ideas. // // Wir haben zwei Häuser zu verkaufen: // http://zmi.at/langegg/ // http://willhaben.at/iad/realestate/object?adId=15306857
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