04-27-2011
Very Active NFS and Disk Usage
Here is the scenario...
NFS share that is accessed every few minutes by approx 70 systems (AIX 5.3/6.1). Filesystem space is being eaten up rapidly according to df however du numbers really never change. lsof and fuser cannot see any unlinked files on either the NFS server or remote clients. Restarting nfsd does not resolve the issue. However, attempting to umount the underlying JFS2 filesystem fails (device busy) obviously but magically frees up the "used" disk space...
Any thoughts on this?
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LEARN ABOUT CENTOS
tapset::nfs
tapset::nfs(3stap) tapset::nfs(3stap)
NAME
tapset::nfs - systemtap nfs tapset
DESCRIPTION
nfs.fop.llseek
NFS client llseek operation
See probe::nfs.fop.llseek(3stap)
for details.
nfs.fop.read
NFS client read operation
See probe::nfs.fop.read(3stap)
for details.
nfs.fop.write
NFS client write operation
See probe::nfs.fop.write(3stap)
for details.
nfs.fop.aio_read
NFS client aio_read file operation
See probe::nfs.fop.aio_read(3stap)
for details.
nfs.fop.aio_write
NFS client aio_write file operation
See probe::nfs.fop.aio_write(3stap)
for details.
nfs.fop.mmap
NFS client mmap operation
See probe::nfs.fop.mmap(3stap)
for details.
nfs.fop.open
NFS client file open operation
See probe::nfs.fop.open(3stap)
for details.
nfs.fop.flush
NFS client flush file operation
See probe::nfs.fop.flush(3stap)
for details.
nfs.fop.release
NFS client release page operation
See probe::nfs.fop.release(3stap)
for details.
nfs.fop.fsync
NFS client fsync operation
See probe::nfs.fop.fsync(3stap)
for details.
nfs.fop.lock
NFS client file lock operation
See probe::nfs.fop.lock(3stap)
for details.
nfs.fop.sendfile
NFS client send file operation
See probe::nfs.fop.sendfile(3stap)
for details.
nfs.fop.check_flags
NFS client checking flag operation
See probe::nfs.fop.check_flags(3stap)
for details.
nfs.aop.readpage
NFS client synchronously reading a page
See probe::nfs.aop.readpage(3stap)
for details.
nfs.aop.readpages
NFS client reading multiple pages
See probe::nfs.aop.readpages(3stap)
for details.
nfs.aop.set_page_dirty
NFS client marking page as dirty
See probe::nfs.aop.set_page_dirty(3stap)
for details.
nfs.aop.writepage
NFS client writing a mapped page to the NFS server
See probe::nfs.aop.writepage(3stap)
for details.
nfs.aop.writepages
NFS client writing several dirty pages to the NFS server
See probe::nfs.aop.writepages(3stap)
for details.
nfs.aop.write_begin
NFS client begin to write data
See probe::nfs.aop.write_begin(3stap)
for details.
nfs.aop.write_end
NFS client complete writing data
See probe::nfs.aop.write_end(3stap)
for details.
nfs.aop.release_page
NFS client releasing page
See probe::nfs.aop.release_page(3stap)
for details.
SEE ALSO
probe::nfs.fop.llseek(3stap), probe::nfs.fop.read(3stap), probe::nfs.fop.write(3stap), probe::nfs.fop.aio_read(3stap),
probe::nfs.fop.aio_write(3stap), probe::nfs.fop.mmap(3stap), probe::nfs.fop.open(3stap), probe::nfs.fop.flush(3stap),
probe::nfs.fop.release(3stap), probe::nfs.fop.fsync(3stap), probe::nfs.fop.lock(3stap), probe::nfs.fop.sendfile(3stap),
probe::nfs.fop.check_flags(3stap), probe::nfs.aop.readpage(3stap), probe::nfs.aop.readpages(3stap),
probe::nfs.aop.set_page_dirty(3stap), probe::nfs.aop.writepage(3stap), probe::nfs.aop.writepages(3stap),
probe::nfs.aop.write_begin(3stap), probe::nfs.aop.write_end(3stap), probe::nfs.aop.release_page(3stap), stap(1), stapprobes(3stap)
IBM
--- tapset::nfs(3stap)