Hi Brendan,
really looking forward to the book. Very thoughtful to cover
non-Solaris OS as well. As you suggested I browsed chapter 5 and tried
a couple of scripts. But nothing resolves my vmdk filenames. I tried
several providers syscall, fsinfo and nfsv3 and all give <unknown> as
filename when I do i/o on the disk. What puzzles me is that the
virtual machine lockfile filename is resolved. It appears that just
the vmdk files cannot be resolved. The very little amount of i/o
corresponds to the small cat and cp commands I used on the virtual
machine.
Why can't any provider each on a different layer revolve that filename?
Thanks,
Frederik
root@snv1# dtrace -n 'syscall::read:entry { @[fds[arg0].fi_pathname] =
count(); }'
dtrace: description 'syscall::read:entry ' matched 1 probe
^C
/devices/pseudo/clone@0:ptm 2
/etc/resolv.conf 2
<unknown> 9
root@snv1# dtrace -n 'fsinfo:::read { @[args[0]->fi_pathname] = sum(arg1); }'
dtrace: description 'fsinfo:::read ' matched 1 probe
^C
/var/adm/wtmpx 4
/etc/resolv.conf 350
<unknown> 1447
/etc/default/nfs 3682
/etc/inet/services 5398
root@snv1# ./nfsv3fileio.dtrace
Tracing... Hit Ctrl-C to end.
^C
Rbytes Wbytes Pathname
0 168 /mpool/running_vm/vm-frontend/.lck-8b00000000000000
0 168
/mpool/running_vm/vm-installer46/.lck-2701000000000000
81920 1340 <unknown>
root@snv1# cat nfsv3fileio.dtrace
#!/usr/sbin/dtrace -s
#pragma D option quiet
dtrace:::BEGIN
{
trace("Tracing... Hit Ctrl-C to end.\n");
}
nfsv3:::op-read-done
{
@readbytes[args[1]->noi_curpath] = sum(args[2]->res_u.ok.data.data_len);
}
nfsv3:::op-write-done
{
@writebytes[args[1]->noi_curpath] = sum(args[2]->res_u.ok.count);
}
dtrace:::END
{
printf("\n%12s %12s %s\n", "Rbytes", "Wbytes", "Pathname");
printa("%@12d %@12d %s\n", @readbytes, @writebytes);
}
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