Re: scsi vs ide performance on fsync's

Strange -- my times stays about the same: $ time ./xlog aa fsync real0m23.695s user0m0.020s sys 0m0.150s $ time ./xlog aa fsync real0m24.024s user0m0.030s sys 0m0.130s $ rm aa $ time ./xlog aa fsync real0m23.979s user0m0.020s sys

Loopbackdevice wierd in 2.4.2 kernel

Hello, This might be a none SCSI problem, but I just discovered a nasty fault in the 2.4.2 kernel. When creating a loopback file on this way: # dd if=/dev/zero of=test.img bs=1k count=1000 # losetup /dev/loop0 test.img # mkfs -t ext2 /dev/loop0 1000 - here it's hanging and this process got a

Re: stability problem with SCSI in linux 2.4.2

Alan Cox wrote: I think I've found a stability problem in the SCSI subsystem of actual kernel 2.4.2. The 2.4.2 adaptec driver has plenty of problems. Either use the -ac version and/or get Justin Gibbs new driver - I would second that and Adaptec deserves some praise for this.

Re: In which Order Host Adapters are detected???

Klaus Naumann wrote: rakesh rakesh wrote: Hi List, I wanted to know in which order different Host adapters in the system are detected by the SCSI. You can have a look in linux/drivers/scsi/hosts.c . It's in there. Why do you need to know that anyway ? While this is true in the

scsi vs ide performance on fsync's

Hi! "Jeremy" == Jeremy Hansen [EMAIL PROTECTED] writes: Jeremy We're doing some mysql benchmarking. For some reason it seems that ide Jeremy drives are currently beating a scsi raid array and it seems to be related Jeremy to fsync's. Bonnie stats show the scsi array to blow away ide as

RE: scsi vs ide performance on fsync's

Hello, Michael Widenius wrote on Monday, March 05, 2001: I wonder from where the fdatasync() is comming; MySQL is not doing those (if you are not running mysqld with --flush) The call is either a fsync or an fdatasync that is done by Berkley DB on the transaction log. Regards, Chris

Kernel support for hot-plugging PCI adapters

Any plans to add support or is there support in the 2.4 kernel for hot-plugging a PCI adapter? It may be in the sources already, but I can't seem to locate it. Any help would be appreciated. Thanks, Duane Grigsby - To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the

Re: Kernel support for hot-plugging PCI adapters

Duane Grigsby wrote: Any plans to add support or is there support in the 2.4 kernel for hot-plugging a PCI adapter? It may be in the sources already, but I can't seem to locate it. Any help would be appreciated. For devices, the support is already there. See Documentation/pci.txt. Look for

Re: scsi vs ide performance on fsync's

Since the intention of fsync and fdatasync seems to be to write dirty fs buffers to persistent storage (i.e. the "oxide") then the best time is not necessarily the objective. Given the IDE times that people have been reporting, it is very unlikely that any of those IDE disks were really doing