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Performance: Difference between revisions
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→processing compressed data
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== processing compressed data == | == processing compressed data == | ||
XDS can process data files that were previously compressed with compress (<code>.Z</code>), gzip (<code>.gz</code>), bzip2 (<code>.bz2</code>) or xz (<code>.xz</code>). It does this by on-the-fly decompression to temporary files with standard names (<code>SCRATCH2XXYY.tmp</code>) where XX stands for the "JOB" and YY for the thread number that produces the temporary file. | XDS can process data files that were previously compressed with compress (<code>.Z</code>), gzip (<code>.gz</code>), bzip2 (<code>.bz2</code>) or xz (<code>.xz</code>). It does this by on-the-fly decompression to temporary files with standard names (<code>SCRATCH2XXYY.tmp</code>) where XX (XX = 01..99) stands for the "JOB" and YY (YY = 01..99) for the thread number that produces the temporary file. | ||
Decompression is time-consuming in terms of CPU and I/O, but saves a lot of disk space. The penalty associated with decompression can be mitigated by | Decompression is time-consuming in terms of CPU and I/O, but saves a lot of disk space. The penalty associated with decompression can be mitigated by | ||