Re: Benchmark: Dell/Perc 6, 8 disk RAID 10
От | Scott Marlowe |
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Тема | Re: Benchmark: Dell/Perc 6, 8 disk RAID 10 |
Дата | |
Msg-id | dcc563d10803132319u19480a4fn16115c415ee57844@mail.gmail.com обсуждение исходный текст |
Ответ на | Re: count * performance issue (Greg Smith <gsmith@gregsmith.com>) |
Ответы |
Re: Benchmark: Dell/Perc 6, 8 disk RAID 10
Re: Benchmark: Dell/Perc 6, 8 disk RAID 10 Re: Benchmark: Dell/Perc 6, 8 disk RAID 10 |
Список | pgsql-performance |
On Fri, Mar 14, 2008 at 12:17 AM, Jesper Krogh <jesper@krogh.cc> wrote: > > Scott Marlowe wrote: > > On Thu, Mar 13, 2008 at 3:09 PM, justin <justin@emproshunts.com> wrote: > > > >> I chose to use ext3 on these partition > > > > You should really consider another file system. ext3 has two flaws > > that mean I can't really use it properly. A 2TB file system size > > limit (at least on the servers I've tested) and it locks the whole > > file system while deleting large files, which can take several seconds > > and stop ANYTHING from happening during that time. This means that > > dropping or truncating large tables in the middle of the day could > > halt your database for seconds at a time. This one misfeature means > > that ext2/3 are unsuitable for running under a database. > > I cannot acknowledge or deny the last one, but the first one is not > true. I have several volumes in the 4TB+ range on ext3 performing nicely. > > I can test the "large file stuff", but how large? .. several GB is not a > problem here. Is this on a 64 bit or 32 bit machine? We had the problem with a 32 bit linux box (not sure what flavor) just a few months ago. I would not create a filesystem on a partition of 2+TB
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