viewing compression ratio

0	how can I see that compression ratio of a file/directory? maprfs compression filesystem asked 04 Oct '11, 07:38 sirpy 41●11●11●13 accept rate: 10%

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You could get it via hadoop mfs -lss_ command. For example in the below output

mapr@maprnode:~# hadoop mfs -lss /libMapRClient.so.1 Found 1 items -rwxrwxrwx Z 3 root root 21444535 1406 2011-10-04 09:33 268435456 /libMapRClient.so.1 p 2049.37.16498 8 perfnode30.perf.lab:5660 perfnode29.perf.lab:5660 perfnode36.perf.lab:5660 0 2081.32.102 1398 perfnode30.perf.lab:5660 perfnode37.perf.lab:5660 perfnode29.perf.lab:5660 mapr@maprnode:~#

Actual file size (uncompressed) is 21444535 bytes. Compressed or physical file size is sum of entires of column 3 times 8K. Column 3 shows number of physical blocks of individual chunks of file. So in this case it is (8 + 1398) * 8K

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answered 04 Oct '11, 09:38

Lohit ♦♦
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accept rate: 44%

edited 04 Oct '11, 09:41

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maprfs ×48
filesystem ×17
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Asked: 04 Oct '11, 07:38

Seen: 967 times

Last updated: 04 Oct '11, 09:41

viewing compression ratio

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