Experimental Physics and
Industrial Control System

Maren Purves <[email protected]> · Mon, 25 Oct 1999 08:04:26 -1000

Know, I don't know, but we found problems writing (much larger) files
from hkbaja47 's. What mechanism do you use to write these?

We found significant differences between just 'writing' to NFS mounted
disks and writing the files using rcp. Part of the reason of NFS being 
slow is TCP/IP stack incompatibility, and part of it is that it is just
plain slow :-). Having said that, it shouldn't really show up for
files as small as you are describing. Other than that, could you have 
problems with a full network or with disk access?

Don't know whether this is of any help,

Maren

Garrett D. Rinehart wrote:
> 
> Anyone know why my brand new mv172 takes minutes to write files to 
the host where the old mv162 did the same job in
> seconds? Even tiny 150 byte files take upwards of a minute sometimes.
> 
> These are text files BTW. The program writes the data fairly quickly, but then
> it just sits there. Doing repeated "ls" of the file, I can watch the file size
> growing, slowly. The instant it gets to its normal size, the program closes the
> file. So, where's the problem? The ioc reads files from this host just fine.
> Sometimes it writes them just fine too. Much more often than not, however, it
> takes WAY too long. Oh, and this acts the same on two different hosts, on two
> separate networks, and with two different iocs (different CPUs and all).

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System