Archive for the 'Computers' Category

Update: FreeBSD’s iSCSI Initiator

Monday, August 3rd, 2009

Well worth mentioning:
There’s a way more updated version of the iSCSI Initiator on the developer’s public FTP site.
ftp://ftp.cs.huji.ac.il/users/danny/freebsd/
With this version I’m now seeing acceptable IO (around 65MB/s reads/writes) after setting tags=256 in iscsi.conf.
All credits to the developer.
Because I’m in the US, I have fairly bad connectivity to that site. I’ve mirrored it here:
http://uminac.com/mirror/ftp.cs.huji.ac.il/users/danny/freebsd/

Solaris 10’s native LDAP client and an OpenLDAP server

Wednesday, July 29th, 2009

After plenty of hours of trying to figure out why it was that Sun’s native LDAP client wouldn’t talk to my OpenLDAP server I decided to call support. I had been through just about every Google result I could read and still got nowhere.
It turns out that when you use the native client you’re [...]

The Scoop on FreeBSD & iSCSI (Currently)

Friday, July 17th, 2009

Please see the update to this post
As A Target (Server)
The only available iSCSI target software in FreeBSD is the /net/iscsi-target port. This is the iSCSI target from OpenBSD and is absolutely not suitable for production use (or even most non-production uses).
Problems I’ve come across:

Does not support CHAP.
Will not allow multiple connections to the same [...]

PowerEdge 2900 iSCSI Performance Problems w/ FreeBSD

Friday, June 19th, 2009

Got a new storage server, it’s a PE2900 from Dell. Installed FreeBSD 7.2 on it, rebuilt the kernel with all the updates and included:
options iscsi_initiator
connected to the iSCSI target across the LAN, then I used:
dd if=/dev/zero of=/mnt/testiscsi/file.out bs=65536
to test the speeds after mounting it. I observed horrific speeds (in the range of 300-500KB/s).
To [...]

VLAN Trunking: Cisco vs. Dell

Sunday, April 26th, 2009

In a recent battle at work I put a Cisco 2960G up against a Dell PowerConnect 5424. The PowerConnects aren’t bad… They’re cheap, gigabit, and Layer-2. Anyway, I quickly found out that unless you use GVRP, the Dell cannot learn what VLANs are out there. You have to specify allowed VLANS [...]

I’m not creative enough for this, and you can’t help me.