Changes between Version 1 and Version 2 of Ticket #77
- Timestamp:
- 02/27/09 12:31:11 (15 years ago)
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Ticket #77 – Description
v1 v2 1 1 We may hit some usability issues with processing CABB data. 2 2 3 A simple calculation shows that reading a 5Gb file at typical disk access speeds (100Mbyte/s) takes around 45sec. That's for one scan, from end to end. Faster disks (eg SSD) will only give factors of two to three more read speed. Write speeds will be similar for HDD, slower for SSD.3 A simple calculation shows that reading a 5Gb file at typical disk access speeds (100Mbyte/s) takes around 45sec. That's for one scan, from end to end. Faster disks (eg SSD) will only give factors of 2 to 3 more read speed. Write speeds will be similar for HDD, slower for SSD. RAID disks accessed over Fiber Channel are limited to a line rate of 2G'''bit'''/s, so you only get about a factor of 2 at best. 4 4 5 5 It seems worth while to build a version with {{{-gprof}}} and try to find the routines that take the most execution time. Perhaps they can be optimised? Or even "memoized"?
