--- In ib-support@y..., "Sergey Balter" <balter@h...> wrote:

> THE CONCLUSION
> IB may corrupt database WHEN SWEEP OR GARBAGE
> COLLECT AND DATA UPDATE (performs insert, delete,
> update) at THE SAME TIME.

Hi, Sergey. It is my beloved bug #221960. You can read long
discussion in bug tracker. Since I implemented workaround - sweep and
backup at night under cron control - I had'nt problem of this kind (I
crossed fingers when said this). But there is another problem - my
client applications live in 8 timezones and I'm not 100% shure there
is'nt connections when maintenance cron starts. I tryed to make
automatic shutdown and unload xinetd before maintenance, but one time
got deadly corrupted database after it. So I stopped this practice and
hope on luck now.

Best regards, Alexander V.Nevsky.