similar to: iSCSI best practices

I'm looking at using GFS for parallel access to shared storage, most likely an iSCSI resource. It will most likely work just fine but I am curious if folks are using anything with fewer system requisites (e.g. installing and configuring the Cluster Suite). Specifically to our case, we have 50 nodes running in-house code (some in Java, some in C) which (among other things) receives JPGs,

Hello all, I got some severe iscsi connection loss on my dom0 (Gentoo 2.6.20-xen-r6, xen 3.1.1). Happening several times a day. open-iscsi version is 2.0.865.12. Target iscsi is the open-e DSS product. Here is a snip of my messages log file: May 5 16:52:50 ying connection226:0: iscsi: detected conn error (1011) May 5 16:52:51 ying iscsid: connect failed (111) May 5 16:52:51 ying iscsid:

Hi all, some results from my configuration. I''ve this configuration (I''m not interested in raw top performances but in reliability.. so, I can accept slow MB/sec and prefer to rely on a RAID6, for example): 1 Infortrend iSCSI Array A16E-G2130-4 with: - 1GB DDR cache - RAID6 - 7 x 500GB sataII Seagate ST3500630NS with 16mb (no budget for SAS) - one of the logic volumes (about

I'm trying to test out an Equallogic PS5500 with a server running CentOS 4.7 I can create a volume and mount it fine using the standard iscsi-initiator-utils tools. The Equallogic box has 3 Gigabit interfaces and I would like to try to set up things so I can read/write from/to the volume using multiple NICs on the server i.e. get 200+ Mbyte/s access to the volume - I've had some

> Simple, it's only a NAS device, and not really a file server / web > server / data base server as well. Here is something I am currently lokoing at, and wondering if you'd considered it or if anyone here has done it. I've got a bunch of existing hardware - really good IBM stuff that is all installed with CentOS (with a few exceptions). We want to move to virtualization, but

Just started messing with multipath against an iSCSI target with 4 nics. What should one expect as behavior when paths start failing? My lab setup was copying some data on a mounted block device when I dropped 3 of 4 paths and the responsiveness of the server completely tanked for several minutes. Is that still expected? Thanks, jlc

Hello, We need to use iSCSI in some of our domUs. By the moment, iSCSI is not for system filesystem, but for data filesystem. I am wondering what is the best way to use it. Is it better to configure it in dom0 and then attach the device to the domU? Or is it better to configure it directly in the domU? I am thinking that if we configure it in the dom0, then we can''t share that iscsi

Hi, may be there are some best practice suggestions for the "best mode" for channel bonding interface? Or in other words, when should/would I use which mode? E.g. I do have some fileservers connected to the users lan and to some ISCSI Storages. Or some Webservers only connected to the LAN. The switches are all new cisco models. I've read sone docs (1), (2) and (3) so the theory

Hi, I am trying to optimize my gigabit network. I have two Intel 1000 MT Gigabit Server Adapters, which support Jumbo Frames -- as well as a Switch that supports Jumbo Frames. However, I am observing some strange behavior in my file transfers from Windows XP to Linux and I am wondering if it has anything to do with the way the Samba variables are set on my Linux box? The "strange

I'm looking to acquire a few new core switches for our network which would be a major upgrade from the cheap unmanaged things we currently have. Basically, just users, servers, and other simple network devices will be plugged into them but I'd like to start doing some testing with iSCSI for various non-production reasons. I have no allegiance to a particular vendor although I do have a

I inherited a xen server that is setup to have all the VM images hosted on an iSCSI mounted NAS array. We been experiencing a random (about every 2-3 days) issue where xen would crash all the VMs, leaving nothing but the Domain0 running. What appears to be happening is something causes the iSCI mount to hiccup. Running "vgchange -a y" and restarting all the VMs brings everything up.

We are utilizing the xen hypervisor on nexenta with ISCSI as our method of communication with the guests (currently ubuntu but could be moving to centos). Obviously jumbo packet support would be nice to have. The last time I see that on the xen roadmap http://wiki.xensource.com/xenwiki/XenRoadMap . Is there a canonical place that spells out if jumbo frames are now supported or still on the

Hi!We''re trying to pinpoint our performance issues and we could use all the help to community can provide. We''re running the latest version of Nexenta on a pretty powerful machine (4x Xeon 7550, 256GB RAM, 12x 100GB Samsung SSDs for the cache, 50GB Samsung SSD for the ZIL, 10GbE on a dedicated switch, 11x pairs of 15K HDDs for the pool). We''re connecting a single Linux

Hello Everyone I work for a University Department that has a high number of Linux Desktop Users. Currently we provide a users home directory via NFS from a file server. Generally it works well for us, but I have been asked to look at our options for expanding the storage we have available. So I thought one of the first things I had better do is consider are there alternatives to the way we

I wonder if someone can point me in right directions. I have two dell servers I setup iscsi so I have four 2 tb hard drives and i had used lvm to create one big partiton and share it using iscsi. How I go about assigning sections of iscsi for virtual hard drives . should go about assigning Should I export the whole 8TB as one iscsi and then use lvm to create smaller virtual disk. Or should I

System info: Red Hat Enterprise Linux Server release 5 (Tikanga) Kerlen 2.6.18-8.el5 SMP x86_64 Samba version 3.0.23c-2 Eth0 && Eht1 bonded to bond0, 2Gbps. /etc/samba/smb.conf attached below... I?m seeing very slow transfers from Samba.... I?m not sure how else to describe it. If I try and copy a 4GB DVD image from the server to any Windows box (XP, 2003, 2008,

Hey folks, I've got a CentOS / RHEL (5.x) environment and am in the process of migrating the 5.3 file server over to an Oracle/Sun 7120 appliance. I want to keep my main 5.3 server as our NIS server but am moving NFS and Samba functions over to the appliance. NFS was a no brainer as one can imagine. Samba seems a bit trickier because of the authentication requirements in the ZFS server.

Hi, I do have two centos 6.6 servers. With a "performance optimized" rsync I get an speed of 15 - 20 MB/s The options I use are: rsync -aHAXxv --numeric-ids --progress -e "ssh -T -c arcfour -o Compression=no -x" If I copy files by smb to/from the servers I do get 60 - 80 MB/s, a dd (r/w) on the storages attached gives 90 MB/s on the 1Gbit ISCSI (Source Server) and up to

Greetings ... I hate to ask these questions, but I dought I will get a straight answer from an Salesmen ... I am looking at putting gigabit in as a back bone for a few Linux servers, but I have used an Accton Gigabit ethernet card with RedHat 8.0/9 and found it a little unstable ... do and RedHat users have a suggestion on a good, but not expensive Gigabit card, basicly for a Samba

The most recent message is: [3108269.919256] sd 2:0:1:0: timing out command, waited 1080s [3108269.919528] sd 2:0:1:0: [sdb] Unhandled error code [3108269.919535] sd 2:0:1:0: [sdb] Result: hostbyte=DID_OK driverbyte=DRIVER_OK [3108269.919540] sd 2:0:1:0: [sdb] CDB: Read(10): 28 00 00 01 21 47 00 00 08 00 [3108269.919586] EXT4-fs error (device sdb1): ext4_find_entry: reading directory #2 offset 0