RE: Extremly long checkpoints: How to find the reason and solve the problem (7.31 FD3)

J?rg Spilker wrote > > machine is about 5 years old and a DEC Alpha cluster with True Unix > 4.0f. We finally found the reason for the long checkpoints. Some kind > of hardware problems with the mirrors. HW configuration are lots of > SCSI drives connected to a fibre channel controller connected to a > fibre channel switch connected with the HBA on the cluster. With > active mirrors we get the long checkpoints. With disabled mirrors > everything is fine. First idea from hp support was to low level > reformat the mirror disks and rebuild the mirror. Low level format > succeeded without problems but after rebuilding the mirror, the > problem reoccurs. So it's possibly one of the others components. > I am surprised you are getting this problem on a Tru64 SAN. If the inevitable happens, and HP suggest you go to the latest OS release, 5.1B - DO NOT USE IT without PK3. Colin Bull c.bull@videonetworks.com sending to informix-list