Re: 15M files

[Hans Reiser <reiser@namesys.com>]

studdugie wrote:

>I can't use V4 because I can't introduce an unstable kernel on the box
>where the app is running.
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I suggest you ask vs to send you a patch for the stable kernel on
wednesday or so after we send our latest bundle to akpm (probably on
monday we will send it).

>On 8/19/05, Hans Reiser <reiser@namesys.com> wrote:
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>>studdugie wrote:
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>>>Hello. I'm looking to replace a couple Berkeley DB data stores w/
>>>regular file system directories backed by reiserfs (3.6). The reason
>>>is Berkeley DB is slow especially for data w/ little or no locality of
>>>reference. I'm posting to this list because I would like to get some
>>>opinions on if reiserfs is suitable for the job. Currently there are
>>>15,079,597 records in 1 of the database. If I moved to a directory
>>>based db it would result in 15,079,597 discreet files ranging in sizes
>>>      
>>>
>>>from 1 byte to 1kb. I was reading the FAQ on the namesys site and it
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>>>mentioned that the r5 hash supports 1,200,000 files w/o collision.
>>>Since 15M is 12.5x greater I'm expecting massive amounts of
>>>collisions. So the question becomes how bad should I expect it to be?
>>>Should I assume the file system can handle it or slow to a crawl?  I
>>>would really appreciate some feedback from the experts before I go
>>>ripping out the Berkeley DB code.
>>>
>>>Thanx.
>>>
>>>
>>>
>>>
>>>      
>>>
>>Use V4, it has much better hashiing.
>>
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