Limit of maximum files/direstories per directory?

sindri · 11-14-2004, 11:02 AM

Hello,

I want to know whether there's a limit of how many files or directories may exist in one single directory under reiserFS?

This piece of information is very important for a project... So any suggestion (or every fact) would be great!

Tanks a lot

Michael

david_ross · 11-14-2004, 11:15 AM

I don't know of a way to do it on the filesystem level without rewriting the driver but you could modify the mkdir command or create a wrapper for it to check the number of directories that already exist before taking any action.

sindri · 11-14-2004, 11:45 AM

Hello,

thanks a lot for the answer...
I think my question was a bit complicated, and so it was perhaps the right answer to the false questiuon i think.. ;o)

Now let's have a second try:

I yust wantet to know whether there are limitations in gerneral using ReiserFS.
Is there a hard limit like e.g. a mximum of 20.000 Files or subdirectories in one single directory.

I want to omit the case, that a customer is trying to create 20.000 subdirectories on the machine
and then his actions are failing at 15.000 cause he's hitting a border, which is a limitation of the failesystem..

TIA
Michael

Tinkster · 11-14-2004, 11:56 AM

From http://www.namesys.com/faq.html

Code:

Specifications for ReiserFS:  (in according to NIST standard)
  	3.5 	3.6
max number of files 	232 - 3 => 4 Gi - 3 	232 - 3 => 4 Gi - 3
max number files a dir can have 	518701895,
but in practice this value is limited by hash function. r5 hash allows about 1 200 000 file names without collisions 	232 - 4 => 4 Gi - 4
but in practice this value is limited by hash function. r5 hash allows about 1 200 000 file names without collisions
max file size 	231 - 1 => 2 Gi - 1 	260 - bytes => 1 Ei,
but page cache limits this to 8 Ti
on architectures with 32 bit int
max number links to a file 	216 => 64 Ki 	232 => 4 Gi
max filesystem size 	232 (4K) blocks => 16 Ti 	232 (4K) blocks => 16 Ti

Cheers,
Tink