[OpenAFS] Definitive list of AFS Limits?

[Christopher Mason]

Hello.

I'm considering OpenAFS for replacing a large Samba/RAID setup 
(10TB), and I'm trying to compile a list of the hard limits in AFS 
below, based on searching the mailing list.  I'm not sure:

1) if these limits are out of date (some of the messages are quite 
old);

2) if there are other important limits I've missed out;

3) if there are practical limits besides these hard limits;

4) of namei/nodei differences.

Any help would be appreciated.  I'm sorry if this is considered a 
FAQ, but I search the FAW looked back to March on the archive and 
didn't see anything.

-c

Minimum file size (overhead): FAQ says 1k file occupies 1k, but 
doesn't address overhead.

Maximum file size: 2GB???  (is this still true?)
<https://lists.openafs.org/pipermail/openafs-info/2002-November/007006.html>

Maximum files in a directory:  The limit depends on the length of the 
filenames; if they are all sufficiently short, the limit is around 
64K.

Maximum files in a volume:

Maximum size of a volume: 4TB
<https://lists.openafs.org/pipermail/openafs-info/2004-November/015530.html>

Number of servers for a read/write volume: 1 (by design)

Maximum number of servers for a read only volume:

Maximum size of a partition:
(OS limited? -- linux = 9TB?)
(Be aware that there needs to be a special
compile-time option enabled to support blockdevices larger 
2TB.<https://lists.openafs.org/pipermail/openafs-info/2005-April/017336.html>)

Maximum cache size:
> My experience is that you want your client cache to be at least as
> large as the largest files you are using.  Performance on files that
> won't fit entirely in the cache is terrible.
... Setting cache size is a bit of a black art.
<https://lists.openafs.org/pipermail/openafs-info/2005-April/017552.html>

Total size of largest known AFS installation:

Can an AFS volume be grown in size?  Shrunk in size?  While online?




-- 
[ Christopher Mason  MPRC Bioinformatics  http://proteomics ]