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1) if these limits are out of date (some of the messages are quite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 ]
_______________________________________________
OpenAFS-info mailing list
[email protected]
https://lists.openafs.org/mailman/listinfo/openafs-info
