Known Issues

This document lists know issues about the latest stable version of Iometer and provides you with suggestions to bypass them.

2003.12.16

OS / platform issue / workaround scope Linux / IA32 Segmentation fault with Red Hat 9   Issue: Running Dynamo on a Linux machine with a glibc (GNU libc) version 2.3 or higher (having NPTL support) - Red Hat 9 for instance - it comes to a segmentation fault after ending a test. This hapens due to the shift from LinuxThreads to NPTL (Native POSIX Thread Library) and the incompatibilities coming with that.   Workaround: Before starting the Dynamo you have to run the following command:   export LD_ASSUME_KERNEL=2.4.1 2003.12.16 and older

List of known issues for version 2003.12.16.

2003.05.10

OS / platform issue / workaround scope all iobw.tst doesn't match the given "Maximum Disk Size" value   Issue: When preparing a new filesystem with an value for "Maximum Disk Size" (field in the Target tab of the Iometer GUI) other then zero and bigger then 2 GB, then there is an variable overflow. This overflow results in another size of the iobw.tst file which then might be much smaller.   Workaround: a.) Before starting your test, create the iobw.tst file (with the wished size) yourself using a tool (e.g. the dd tool under Unix). Then use zero as "Maximum Disk Size" - that way the worker uses the existing iobw.tst file and adapt to its size. b.) Download the Iometer sources and apply the iometer_large_work_file patch (#821482) which was provided by Russell Reed. 2003.05.10 and older Linux / IA32 Segmentation fault with Red Hat 9   Issue: Running Dynamo on a Linux machine with a glibc (GNU libc) version 2.3 or higher (having NPTL support) - Red Hat 9 for instance - it comes to a segmentation fault after ending a test. This hapens due to the shift from LinuxThreads to NPTL (Native POSIX Thread Library) and the incompatibilities coming with that.   Workaround: Before starting the Dynamo you have to run the following command:   export LD_ASSUME_KERNEL=2.4.1 2003.05.10 and older Solaris / SPARC Segmentation fault when having multiple swap devices   Issue: Running Dynamo on a Solaris machine, a detection of the swap devices is done. If you have multiple swap devices configured, the Dynamo crashes with a segmentation fault.   Workaround: a.) Configure only one swap device b.) Apply the needed changes (provided by Robert H. Creecy) on source code level (file IOManagerSolaris.cpp line 1198):   wrong: strs = (char *)malloc(num+1 * MAX_NAME); correct: strs = (char *)malloc((num+1) * MAX_NAME); 2003.05.10 and older

List of known issues for version 2003.05.10.