blogbench and write-open serialization

2013-05-17 Thread Ivan Voras
During the BSDCan & DevSummit I got interested in finding out why blogbench is so slow on FreeBSD. After talking to jhb, it looked like one of the reasons might be that opening files with O_RDWR or O_WRONLY (anything opening the file for writing) is serialized. To check this, I've written a small

Re: tape (sa0) on sparc64 ?

2013-05-17 Thread Matthew Jacob
On 5/16/2013 1:51 PM, Zaphod Beeblebrox wrote: ... [1:25:325]root@run:/home/foo> dd if=/dev/sa0 of=tape5 hmm. try tcopy. Can we see any complaints from /var/log/messages? (this would be better discussed on freebsd-scsi) ___ freebsd-hackers@freebsd.

Re: tape (sa0) on sparc64 ?

2013-05-17 Thread Bob Bishop
Hi, On 17 May 2013, at 01:30, Greg 'groggy' Lehey wrote: > On Thursday, 16 May 2013 at 19:56:14 -0400, Zaphod Beeblebrox wrote: >> On Thu, May 16, 2013 at 5:08 PM, Bob Bishop wrote: >>> On 16 May 2013, at 21:51, Zaphod Beeblebrox wrote: >>> I have to retrieve some very old backups. They we

Re: tape (sa0) on sparc64 ?

2013-05-17 Thread Wojciech Puchar
1:0x26:DDS-4 variable 97000DCLZ 2:0x26:DDS-4 variable 97000DCLZ 3:0x26:DDS-4 variable 97000DCLZ - Current Driver State: at rest. - File Number: 0 Rec