[gpfsug-discuss] gpfsug-discuss Digest, Vol 87, Issue 21
Prasad Surampudi
prasad.surampudi at theatsgroup.com
Tue Apr 23 17:14:24 BST 2019
I am trying to analyze a filehist report of a Spectrum Scale filesystem I recently collected. Given below is the data and I have put my interpretation in parentheses. Could someone from Sale development review and let me know if my interpretation is correct? Filesystem block size is 16 MB and system pool block size is 256 KB.
GPFS Filehist report for Test Filesystem
All: Files = 38,808,641 (38 Million Total Files)
All: Files in inodes = 8153748
Available space = 1550139596472320 1550140 GB 1550 TB
Total Size of files = 1110707126790022
Total Size of files in inodes = 26008177568
Total Space = 1123175375306752 1123175 GB 1123 TB
Largest File = 3070145200128 - ( 2.8 TB)
Average Size = 28620098 – ( 27 MB )
Non-zero: Files = 38642491
Average NZ size = 28743155
Directories = 687233 (Total Number of Directories)
Directories in inode = 650552
Total Dir Space = 5988433920
Avg Entries per dir = 57.5 (Avg # files per Directory)
Files with indirect blocks = 181003
File%ile represents the cummulative percentage of files.
Space%ile represents the cummulative percentage of total space used.
AvlSpc%ile represents the cummulative percentage used of total available space.
Histogram of files <= one 16M block in size
Subblocks Count File%ile Space%ile AvlSpc%ile
--------- -------- ---------- ---------- ----------
0 7,669,346 19.76% 0.00% 0.00% ( ~7 Million files <= 512 KB )
1 25,548,588 85.59% 1.19% 0.86% - ( ~25 Million files > 512 KB <= 1 MB )
2 1,270,115 88.87% 1.31% 0.95% - (~1 Million files > 1 MB <= 1.5 MB )
....
....
....
32 10387 97.37% 2.43% 1.76%
Histogram of files with N 16M blocks (plus end fragment)
Blocks Count File%ile Space%ile AvlSpc%ile
--------- -------- ---------- ---------- ----------
1 177550 97.82% 2.70% 1.95% ( ~177 K files <= 16 MB)
....
....
....
100 640 99.77% 17.31% 12.54%
Number of files with more than 100 16M blocks
101+ 88121 100.00% 100.00% 72.46% ( ~88 K files > 1600 MB)
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