[Bug 1470165] [NEW] sysstat data corruption when adding or removing VCPUs

[Guillaume Penin]

Public bug reported:

Using sysstat 10.0.3-1 on Ubuntu Precise 12.04 LTS.

When we add or remove VCPUs to virtual machines (KVM or VMWare in our
case), sysstat data starts to be corrupted the next day. All sysstat
data will be corrupted, until the current data file is deleted as a
workaround.

- Symptom :

[root at server ~]# sar -A -f /var/log/sysstat/sa30
Invalid system activity file: /var/log/sysstat/sa30

- Workaround :

[root at server ~]# rm -f /var/log/sysstat/sa30

- Attachment :

Sysstat data archive with :

- Correct data : sa22, sa23
- Corrupted data : sa24 => sa29
- Correct data since workaround : sa30

** Affects: sysstat (Ubuntu)
     Importance: Undecided
         Status: New

** Attachment added: "sysstat.tar.gz"
   https://bugs.launchpad.net/bugs/1470165/+attachment/4422529/+files/sysstat.tar.gz

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Title:
  sysstat data corruption when adding or removing VCPUs

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