Re: [gentoo-user] iscsitarget or targetcli?
On 29/01/15 10:25, J. Roeleveld wrote: Hi all, I want to set up an iSCSI server (target in iSCSI terminology) running on Gentoo. Does anyone know which of the following 2 are better: - sys-block/iscsitarget - sys-block/targetcli Both don't seem to have had an update for over 2 years, but targetcli seems to be just the config-tool for whatever is in current kernels where, I think, iscsitarget is a userspace daemon? Many thanks, Joost I'd actually suggest using SCST http://monklinux.blogspot.ie/2012/02/scst-configuration-how-to-using-gentoo.html works very well and has a few extra niceties (dynamic resize notification being one) that seem to be missing on other iscsi targets. nice and easy syntax too
Re: [gentoo-user] iscsitarget or targetcli?
On 29/01/15 11:25, J. Roeleveld wrote: Hi all, I want to set up an iSCSI server (target in iSCSI terminology) running on Gentoo. Does anyone know which of the following 2 are better: - sys-block/iscsitarget - sys-block/targetcli Both don't seem to have had an update for over 2 years, but targetcli seems to be just the config-tool for whatever is in current kernels where, I think, iscsitarget is a userspace daemon? Many thanks, Joost Hi, sys-block/iscsitarget is composed of a kernel module and a userspace daemon, both compiled and installed by the ebuild. I would second the recommendation for SCST, which is actively developed and in my experience is quite more stable and tends to recover better from unexpected events than sys-block/iscsitarget (I have used both for quite some time). The only downside of SCST is that it requires a bit more work to install, mainly because there is no ebuild for it; moreover, while it can be built against and run on a stock kernel, it comes with a couple of kernel patches which should be applied for optimal performance or are needed fot specific features (e.g. the vdisk backend). andrea
Re: [gentoo-user] iscsitarget or targetcli?
What is the difference between the kernel-stuff (targetcli is only the config- tool) and scst? http://scst.sourceforge.net/comparison.html It was written by the SCST team, so it should be taken with a grain of salt; it is nonetheless a useful overview of the alternatives out there. andrea
Re: [gentoo-user] iscsitarget or targetcli?
On Thursday, January 29, 2015 11:28:56 AM thegeezer wrote: On 29/01/15 10:25, J. Roeleveld wrote: Hi all, I want to set up an iSCSI server (target in iSCSI terminology) running on Gentoo. Does anyone know which of the following 2 are better: - sys-block/iscsitarget - sys-block/targetcli Both don't seem to have had an update for over 2 years, but targetcli seems to be just the config-tool for whatever is in current kernels where, I think, iscsitarget is a userspace daemon? Many thanks, Joost I'd actually suggest using SCST http://monklinux.blogspot.ie/2012/02/scst-configuration-how-to-using-gentoo. html works very well and has a few extra niceties (dynamic resize notification being one) that seem to be missing on other iscsi targets. nice and easy syntax too I managed to get dynamic resizing working when I did my first tests with targetcli and the kernel-inbuild stuff: Device Drivers --- M Generic Target Core Mod (TCM) and ConfigFS Infrastructure --- M TCM/IBLOCK Subsystem Plugin for Linux/BLOCK M TCM/FILEIO Subsystem Plugin for Linux/VFS M TCM/pSCSI Subsystem Plugin for Linux/SCSI M Linux-iSCSI.org iSCSI Target Mode Stack I only had to tell the iscsi-client to recheck the new size: server : # resize filesystem (Server was using targetcli with the kernel-inbuild stuff) client : # iscsiadm -m node -T iqnvm5... -R client : # resize2fs /dev/sdb What is the difference between the kernel-stuff (targetcli is only the config- tool) and scst? -- Joost
Re: [gentoo-user] iscsitarget or targetcli?
On Thursday, January 29, 2015 02:23:14 PM Andrea Conti wrote: What is the difference between the kernel-stuff (targetcli is only the config- tool) and scst? http://scst.sourceforge.net/comparison.html It was written by the SCST team, so it should be taken with a grain of salt; it is nonetheless a useful overview of the alternatives out there. andrea I found a few comparisons like that. I would prefer one from an independent source as both SCST and linux-iscsi.org (which seems to promote LIO/targetcli) both paint the picture theirs is stable and the other one might be -- Joost
Re: [gentoo-user] iscsitarget or targetcli?
On Thursday, January 29, 2015 02:18:13 PM Andrea Conti wrote: On 29/01/15 11:25, J. Roeleveld wrote: Hi all, I want to set up an iSCSI server (target in iSCSI terminology) running on Gentoo. Does anyone know which of the following 2 are better: - sys-block/iscsitarget - sys-block/targetcli Both don't seem to have had an update for over 2 years, but targetcli seems to be just the config-tool for whatever is in current kernels where, I think, iscsitarget is a userspace daemon? Many thanks, Joost Hi, sys-block/iscsitarget is composed of a kernel module and a userspace daemon, both compiled and installed by the ebuild. That's what I thought as well. LIO / targetcli does seem to work and is implemented into the Linux kernel. Is there anyone with actual experience with this together with Gentoo? As I said, my initial quick tests showed that it works the way I want it to. I would second the recommendation for SCST, which is actively developed and in my experience is quite more stable and tends to recover better from unexpected events than sys-block/iscsitarget (I have used both for quite some time). The only downside of SCST is that it requires a bit more work to install, mainly because there is no ebuild for it; moreover, while it can be built against and run on a stock kernel, it comes with a couple of kernel patches which should be applied for optimal performance or are needed fot specific features (e.g. the vdisk backend). I had a look at it, but the howtos I find are all based on older kernels (2.6.x). I am currently using 3.14.27 for my testing as ZFS requires a kernel older then 3.16. I am reluctant to apply kernel patches, would prefer just some modules. The documentation for installing SCST is scarcer then for LIO/targetcli. (The latter has recent documentation on the Arch-linux site) -- Joost
