We are considerng a file organization with rather unusual characteristics, and are wondering if we are likely to run into performance pathologies.
The proposed file organization would be used to provide a TSM server with a family of sequential storage pools sharing a single device class with DEVTYPE=FILE. We would use LVM to assemble a large number of ESCON 3390 volumes into a single file system with a size in the hundreds of gigabytes. This would be an ext3 file system with metadata journalling. All files in the file system would reside in a single directory. The directory would start out empty each night, and end up with a few hundred files. Some of the files would be as small as tens of megabytes, some would be two gigabytes, and some would have various sizes in between. There would sometimes be as many as seventy files open for writing at the same time. All writes would be appends. There would sometimes be as many as four files open for reading while the write activity was going on. No individual file would be open for reading and writing at the same time. ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
