[Linux-cluster] GFS limits: fs size, etc.
Ed L Cashin
ecashin at coraid.com
Fri Sep 10 13:52:15 UTC 2004
Hi. I'm trying to list all of the GFS limits that I can find. The
one I'm most interested in is max filesystem size. Here are the ones
I've found so far.
Is the theoretical limit on filesystem size 2^64 bytes or is there a
practical constraint? I couldn't find that.
file size: gfs_dinode has u64 di_size member, so
16777216 TB is theoretical max file size
gfs_mkfs manpage says min block size 512 bytes, max block size is
the page size for the host
Also, according to a comment at the top of gfs_ondisk.h, the
de_rec_len member of gfs_dirent limits the FS block size to 64KB.
gfs_mkfs manpage says min is 32MB
max name length: 255 bytes
max data length: 65535 bytes
Ed L Cashin <ecashin at coraid.com>
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