On 01/11/2010 07:25 AM, Akinobu Mita wrote:
The volume directory may have 2^16 (=65536) directories because
prefix length of object pathname is 4 bytes. But ext3 filesystem can
only have EXT_LINK_MAX (32000) directories.
This changes the prefix length from 4 bytes to 3 bytes and breaks
the volume data format compatibility with older version.
Now the maximum count of links in volume directory is 2^12 (=4096)
and it doesn't exceed ext3's upper limit of max links.
Signed-off-by: Akinobu Mita<akinobu.mita@xxxxxxxxx>
---
server/be-fs.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
hey, welcome, new contributor!
This patch makes sense, but it also raises the question of whether or
not we should move to a two-level directory scheme, eg.
123/456/7890ABCDEF
rather than
123/4567890ABCDEF
to limit the size of the top-level directories. It really depends on
the object counts a typical chunkd node will be seeing. As with the
other patch, I will give this some thought after sleep.
Comments welcome!
Jeff
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