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mfsstatsdump(8) This is part of MooseFS mfsstatsdump(8) NAME mfsstatsdump - dump usage data from master stats file in csv or png format SYNOPSIS mfsstatsdump -f fields [-i stats_file] [-r range] [-s separator] [-p png_filename [-x chart_width] [-y chart_height]] [-hHd] DESCRIPTION mfsstatsdump dumps usage data from master stats file. These are the same data sets that are used to make GUI charts. Output can be either in text format (csv) or in graphical format (png). That means -p, -x and -y options are mutually exclusive with -h, -H and -d options. MooseFS master server saves the stats file in the DATA_PATH directory - see mfsmaster.cfg(5) OUTPUT Text output - text (csv) file where first column is a timestamp (or date if -d option was specified), the following column are what was specified with the -f options, formatted according to used options (none, -s and -h or -H) Graphical output - one png file with a chart is created for every field specified with the -f option, according to the naming scheme declared with the -p option. Size may be adjusted with -x and -y options. OPTIONS -f field names separated by ',' (see FIELDS section); at least one field is mandatory; if an asterisk (*) is used, all fields are dumped -i name of mfs binary stats file (default: default_data_path/stats.mfs) -r range type: 0 - short range (minute) 1 - medium range (6 minutes) 2 - long range (30 minutes) 3 - very long range (day) -s specify column separator (default: tabulator) -p optional PNG filename (field name will be added before .png; YYYY -> YYYY_FIELD.png, YYYY.png -> YYYY_FIELD.png) -x PNG chart width (default: 1600) -y PNG chart height (should be divisible by 20 - if not then it will be adjusted; default:320) -h "human-readable" numbers using base 2 prefixes (IEC 60027) -H "human-readable" numbers using base 10 prefixes (SI) -d show timestamps in YYYY-MM-DD HH:MM format FIELDS ucpu User cpu usage scpu System cpu usage cpu Total cpu usage (in csv sum of scpu and ucpu, in png shows both in different colors) delete Number of chunk deletions replicate Number of chunk replications statfs Number of statfs operations getattr Number of getattr operations setattr Number of setattr operations lookup Number of lookup operations mkdir Number of mkdir operations rmdir Number of rmdir operations symlink Number of symlink operations readlink Number of readlink operations mknod Number of mknod operations unlink Number of unlink operations rename Number of rename operations link Number of link operations readdir Number of readdir operations open Number of open operations read Number of read operations write Number of write operations prcvd Received packets psent Sent packets brcvd Received bytes bsent Sent bytes memoryrss Resident memory usage memoryvirt Virtual memory usage mem Total memory usage (in csv is the same as memoryvirt, in png shows both memoryrss and memoryvirt using two colors) usedspace Used raw disk space totalspace Total raw disk space space Total raw disk space (in csv the same as totalspace, in png shows both usedspace and totalspace using two colors) readchunk Number of chunk_read operations writechunk Number of chunk_write operations create Number of chunk creation attempts change Number of chunk internal operation attempts delete_ok Number of successful chunk deletions delete_err Number of unsuccessful chunk deletions delete_stat Sum of successful and unsuccessful chunk deletions (in png shows both delete_ok and delete_err using two colors) replicate_ok Number of successful chunk replications replicate_err Number of unsuccessful chunk replications replicate_stat Sum of successful and unsuccessful chunk replications (in png shows both replicate_ok and replicate_err using two colors) create_ok Number of successful chunk creations create_err Number of unsuccessful chunk creations create_stat Sum of successful and unsuccessful chunk creations (in png shows both create_ok and create_err using two colors) change_ok Number of successful chunk internal operations change_err Number of unsuccessful chunk internal operations change_stat Sum of successful and unsuccessfulchunk internal operations (in png shows both change_ok and change_err using two col- ors) split_ok Number of successful chunk split operations split_err Number of unsuccessful chunk split operations split_stat Sum of successful and unsuccessful chunk split operations (in png shows both split_ok and split_err using two colors) fileobjects Number of file objects metaobjects Number of non-file objects (directories,symlinks,etc.) objects Number of all objects (in png shows both fileobjects and metaobjects using two colors) chunksec8 Total number of chunks stored in EC8 format chunksec4 Total number of chunks stored in EC4 format chunkscopy Total number of chunks stored in COPY format chunks Total number of chunks stored in any format (in png shows chunksec8, chunksec4 and chunkscopy using three colors) chregdanger Number of endangered chunks (mark for removal excluded) chregunder Number of undergoal chunks (mark for removal excluded) regunder Number of endangered and undergoal chunks (mark for removal excluded, in png shows chregdanger and chregunder using two colors) challdanger Number of endangered chunks (mark for removal included) challunder Number of undergoal chunks (mark for removal included) allunder Number of endangered and undergoal chunks (mark for removal included, in png shows challdanger and challunder using two colors) bytesread Average number of bytes read per second by all clients byteswrite Average number of bytes written per second by all clients fsync Number of fsync operations lock Number of lock operations snapshot Number of snapshot operations truncate Number of truncate operations getxattr Number of getxattr operations setxattr Number of setxattr operations getfacl Number of getfacl operations setfacl Number of setfacl operations fcreate Number of file create operations meta Number of extra metadata operations (sclass,trashreten- tion,eattr etc.) delay (pro only) Master max delay in seconds servers Number of all registered chunk servers (both connected and disconnected) dservers Number of all disconnected chunk servers mdservers Number of disconnected chunk servers that are in mainte- nance mode cservers Number of all registered chunk servers (in csv equals to servers, in png shows servers, dservers and mdservers using three different colors) udiff Difference in space usage percent between the most and least used chunk server NOTES Data sets delete and delete_stat in a properly working system should be roughly the same, but not always identical (in their CSV form), this stems from the fact that the delete set is calculated using the number of re- quests sent by the master, and the delete_stat set is calculated using the number of replies received from chunk servers, so local fluctuations may be observed (i.e. one minute has more sent requests - higher value in the delete set and the next minute has more answers - higher value in delete_stat set). But if one were to calculate the sum of differences be- tween the two sets over time, this sum should never grow over a certain number. However, if there is some kind of problem (with network communication and/or chunk server process(es)) and some chunk delete requests are stalled/go missing, then delete values may be constantly higher than the delete_stat values and the sum of differences between the two sets will be steadily growing over time. Same goes for replicate(_stat), create(_stat), change(_stat) and split(_stat) data sets. REPORTING BUGS Report bugs to <bugs@moosefs.com>. COPYRIGHT Copyright (C) 2026 Jakub Kruszona-Zawadzki, Saglabs SA This file is part of MooseFS. MooseFS is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Soft- ware Foundation, version 2 (only). MooseFS is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more de- tails. You should have received a copy of the GNU General Public License along with this program; if not, see <https://www.gnu.org/licenses/>. SEE ALSO mfsmount(8), moosefs(7) MooseFS 4.59.1-1 May 2026 mfsstatsdump(8)
NAME | SYNOPSIS | DESCRIPTION | OPTIONS | NOTES | REPORTING BUGS | COPYRIGHT | SEE ALSO
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