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NEC SX ACE Disk Storage

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There is no backup of data. Most important first.

Home filesystem has quotas active, temporary diskspace can be requested through workspace mechanism.

For home and workspace filesystems, best performance is achieved with large I/O in blocks > 4MB. All filestytems can be accessed from SXes and frontends under same path.

Avoid formated I/O on SX, try to do large block, unformated I/O.

You can use the variables F_SETBUF and C_SETBUF to set buffer size of standard buffered I/O.

There is NO LOCAL disk space on SX nodes!

To copy large files on SX use

cp -b 32768 <source> <target>

this speeds up the copy by a factor of 5 vs. the default (cp -b 1024), a buffer > 32768 will not work!