This parameter has the following 2 advantages:
1. FUSE(version > 2.8) the default single IO write size is 128k (controlled by max_write), if I use bs=4M in the FIO tool test,
you will find that 4*1024k/128=32 is needed, ie 32 IO operations are needed . If I adjust max_write to 4M,
only one operation is needed, which greatly improves the write performance of cephfs during fuse mount.
Of course, the above implementation requires libfuse and kernel fuse to support.
2. In addition, we can also limit the single IO write size by setting max_write to less than 128K.
Signed-off-by: huanwen ren <ren.huanwen@zte.com.cn>
Client.cc marks session as stale instead of reconecting after received
reset from MDS. On MDS side session is closed so MDS is ignoring cap
renew. This adds option to reconnect stale client sessions instead of
just marking sessions stale.
Fixes: http://tracker.ceph.com/issues/18757
Signed-off-by: Henrik Korkuc <henrik@kirneh.eu>
