11-15-2018
Will those 2 NFS boxes have same disk presented or data replication is required sided with NFS ?
What does high IO mean, are you running databases or ?
You do understand that NFS is not a clustered file system.
So writing in same file from multiple nodes will not work as you expect.
Can you elaborate a bit more about the architecture and application and what it does ?
Perhaps glusterfs, HDFS or ISCSI could be a better advice.
Regards
Peasant.
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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)