Brief Data

This format does NOT include data for any individual devices such as cpu, disk, network, nfs, lustre, process, slabs or tcp. If you do select any one of them collectl will force --verbose format.

Buddy (Memory Fragmentation) Data, collectl -sB

The smaller the value the more accuracy as follows:

• 0-9 are represented by the digits 0 through 9
• 10-99 by the letters a through i
• 100-999 by the letters j through r
• >1000 by powers of 10, using s through z

#<---Memory-->
#   Fragments
  smkj9576040

CPU Data, collectl -sc

#<--------CPU-------->
#cpu sys inter  ctxsw

Disk, collectl -sd

If you specify filtering with --dskfilt, the disks that match the pattern(s) will either be included or excluded from the the summary data. However, the data will still be collected so if recorded to a file can later be viewed.

#<---------------Disks---------------->
#KBRead  Reads  Size KBWrit Writes Size

Infiniband, collectl -sx

#<---------------InfiniBand--------------->
#  KBIn  PktIn Size  KBOut PktOut Size Errs

Inodes/Filesystem, collectl -si

#<----Files--->
#Handle Inodes
   5100 116110

Lustre

Lustre data actually falls into one of 3 categories - client, mds and oss. Collectl determines the type of system it is running on (a system can have multiple personalities) and reports on all it finds, unless specifically selected via -L.

Lustre Client, collectl -sl

#<-------------Lustre Client------------->
# KBRead  Reads Size  KBWrite Writes Size

The following format of lustre client data is selected by including -OR and adds readahead statistics to the previous six, noting the Size fields are dependent on --iosize being specificed.

#<--------------------Lustre Client-------------------->
# KBRead  Reads Size  KBWrite Writes Size   Hits Misses

Lustre MDS (Meta-Data Server)
The first format is for lustre versions 1.6.5 and beyond while the second format is for earlier releases

#<--------Lustre MDS-------->
#Gattr+ Sattr+   Sync  Unlnk

#<--------Lustre MDS-------->
#Gattr+ Sattr+   Sync  Reint

Lustre OSS (Object Storage Server), collectl -sc

#<--------------Lustre OST-------------->
# KBRead  Reads Size  KBWrit Writes Size

Memory, collectl -sm

#<-----------Memory---------->
#free buff cach inac slab  map

Network, collectl -sn

If you specify filtering with --netfilt, the names that match the pattern(s) will either be included or excluded from the the summary data. However, the data will still be collected so if recorded to a file can later be viewed.

Also be sure to keep in mind that like all other data, network counters are always normalized to /sec rates. This means that something like errors, which themselves might be really small, could be reported as 0 if less than 1/2 the sampling interval. To see unnormalized values use -on.

#<------------------Network------------------>
#  KBIn  PktIn Size  KBOut  PktOut Size Error

NFS, collectl -sf

#<------NFS Totals------>            #<------NFS [s3,c4]----->
# Reads Writes Meta Comm             # Reads Writes Meta Comm

Slabs, collectl -sy

#<----slab---->
# Alloc   Bytes

Sockets, collectl -ss

#<------Sockets----->
#  Tcp  Udp  Raw Frag

TCP, collectl -st

#<----------TCP---------->
#  IP  Tcp  Udp Icmp TcpX 
    0    0    0    0    0