Slow / Performance problem.
We have 2 Equallogic Systems, And a Dell Servers. We have every server give a block device home dir , so the user data are on the home dir this is working great its format on xfs filesystem, and running iscsiadm version 2.0-870 with linux kernel 3.10.57 But when we logging on the server, the first time we do a dir command on the home dir, its take a long time when we get feedback on the dir , the next time is fast when we do a dir. Now we have users on this systems and this problem give not good performance on sql and websites an e-mail we are running on the server. Are the some information how i can fix ore maybe get this problem better under control ? I hope so that somebody can help me, i am searching for more than 3 weeks now. -- You received this message because you are subscribed to the Google Groups open-iscsi group. To unsubscribe from this group and stop receiving emails from it, send an email to open-iscsi+unsubscr...@googlegroups.com. To post to this group, send email to open-iscsi@googlegroups.com. Visit this group at http://groups.google.com/group/open-iscsi. For more options, visit https://groups.google.com/d/optout.
Re: Slow / Performance problem.
bash-4.3# iscsiadm -m session -P3 iSCSI Transport Class version 2.0-870 version 2.0-872 Target: iqn.2001-05.com.equallogic:0-8a0906-6c5f17a03-1244d61b0964922b-srv2 Current Portal: 192.3.168.39:3260,1 Persistent Portal: 192.3.168.25:3260,1 ** Interface: ** Iface Name: default Iface Transport: tcp Iface Initiatorname: iqn.2005-03.org.open-iscsi:17bf658bc39 Iface IPaddress: 192.3.168.51 Iface HWaddress: default Iface Netdev: default SID: 1 iSCSI Connection State: LOGGED IN iSCSI Session State: LOGGED_IN Internal iscsid Session State: NO CHANGE Negotiated iSCSI params: HeaderDigest: None DataDigest: None MaxRecvDataSegmentLength: 131072 MaxXmitDataSegmentLength: 65536 FirstBurstLength: 65536 MaxBurstLength: 262144 ImmediateData: Yes InitialR2T: No MaxOutstandingR2T: 1 Attached SCSI devices: Host Number: 7State: running scsi7 Channel 00 Id 0 Lun: 0 We have not the Hit Kit installed on the Servers. We use Jumbo frames on the switches thats work, but flowcontrol dont work with the switch in the Dell Bladecenter. We use the default mount point /dev/sde on /home type xfs (rw) -- You received this message because you are subscribed to the Google Groups open-iscsi group. To unsubscribe from this group and stop receiving emails from it, send an email to open-iscsi+unsubscr...@googlegroups.com. To post to this group, send email to open-iscsi@googlegroups.com. Visit this group at http://groups.google.com/group/open-iscsi. For more options, visit https://groups.google.com/d/optout.
Re: Slow / Performance problem.
Heres a sample how it looks like when Hit Kit is working (which whould boost your SAN Performance dramatically). root@xxx ~]$ iscsiadm -m session -P3 iSCSI Transport Class version 2.0-870 version 6.2.0-873.10.el6 Target: iqn.2001-05.com.equallogic:4-52aed6-f71e0d568-d8000144f353- Current Portal: 192.168.xx106:3260,1 Persistent Portal: 192.168.xx100:3260,1 ** Interface: ** Iface Name: eql.p3p2 Iface Transport: tcp Iface Initiatorname: iqn.1994-05.com.redhat:11b76f936ab4 Iface IPaddress: 192.168.xx201 Iface HWaddress: empty Iface Netdev: p3p2 SID: 1030 iSCSI Connection State: LOGGED IN iSCSI Session State: LOGGED_IN Internal iscsid Session State: NO CHANGE * Timeouts: * Recovery Timeout: 15 Target Reset Timeout: 30 LUN Reset Timeout: 30 Abort Timeout: 15 * CHAP: * username: empty password: username_in: empty password_in: Negotiated iSCSI params: HeaderDigest: None DataDigest: None MaxRecvDataSegmentLength: 65536 MaxXmitDataSegmentLength: 65536 FirstBurstLength: 65536 MaxBurstLength: 262144 ImmediateData: Yes InitialR2T: No MaxOutstandingR2T: 1 Attached SCSI devices: Host Number: 1030 State: running scsi1030 Channel 00 Id 0 Lun: 0 Attached scsi disk sde State: running Current Portal: 192.168.xx103:3260,1 Persistent Portal: 192.168.xx100:3260,1 ** Interface: ** Iface Name: eql.p3p1 Iface Transport: tcp Iface Initiatorname: iqn.1994-05.com.redhat:11b76f936ab4 Iface IPaddress: 192.168.xx200 Iface HWaddress: empty Iface Netdev: p3p1 SID: 1031 iSCSI Connection State: LOGGED IN iSCSI Session State: LOGGED_IN Internal iscsid Session State: NO CHANGE * Timeouts: * Recovery Timeout: 15 Target Reset Timeout: 30 LUN Reset Timeout: 30 Abort Timeout: 15 * CHAP: * username: empty password: username_in: empty password_in: Negotiated iSCSI params: HeaderDigest: None DataDigest: None MaxRecvDataSegmentLength: 65536 MaxXmitDataSegmentLength: 65536 FirstBurstLength: 65536 MaxBurstLength: 262144 ImmediateData: Yes InitialR2T: No MaxOutstandingR2T: 1 Attached SCSI devices: Host Number: 1031 State: running scsi1031 Channel 00 Id 0 Lun: 0 Attached scsi disk sdg State: running Current Portal: 192.168.xx101:3260,1 and so on, multipathing is the Point. But different than with other SAN, since the EQL use a Gate IP which redirects you to one of the other IPs ehcmcli -d Warning: Legacy syntax detected! Please use the new format of the command: ehcmcli status Generating diagnostic data, please wait... Adapter List Name: p3p1 IP Address: 192.168. HW addr: 90:E2:BA:06: Name: p3p2 IP Address: 192.168. HW addr: 90:E2:BA:06: Name: p3p3 IP Address: 192.168. HW addr: 90:E2:BA:06: Name: p3p4 IP Address: 192.168. Volume list Volume: someonesvolume Target name: iqn.2001-05.com.equ Device to mount: /dev/eql/yep-a-volume Status: Normal Session: 986 /dev/sdf 192.168.xx200 - 192.168.xx102 8d 02:41:53 Session: 1032 /dev/sdh
Re: Slow / Performance problem.
We can not hit kit installed thats is correct, the system are not support get i back from the installer. We use the fowling switchs Dell Bladecenter we use the Dell PowerEdge M I/O Aggregator connect with 10Gbit to HP Procruve 3800 switchs and then connected to the 1Gbit Equallogic's. Sometime its takes more than 30 / 45 seconds to get the data back, and the sql and webserver are waiting on this, are the some setting whate can give this problem ? On Tuesday, December 2, 2014 3:22:22 PM UTC+1, Stefan B wrote: We have 2 Equallogic Systems, And a Dell Servers. We have every server give a block device home dir , so the user data are on the home dir this is working great its format on xfs filesystem, and running iscsiadm version 2.0-870 with linux kernel 3.10.57 But when we logging on the server, the first time we do a dir command on the home dir, its take a long time when we get feedback on the dir , the next time is fast when we do a dir. Now we have users on this systems and this problem give not good performance on sql and websites an e-mail we are running on the server. Are the some information how i can fix ore maybe get this problem better under control ? I hope so that somebody can help me, i am searching for more than 3 weeks now. -- You received this message because you are subscribed to the Google Groups open-iscsi group. To unsubscribe from this group and stop receiving emails from it, send an email to open-iscsi+unsubscr...@googlegroups.com. To post to this group, send email to open-iscsi@googlegroups.com. Visit this group at http://groups.google.com/group/open-iscsi. For more options, visit https://groups.google.com/d/optout.
Re: Slow / Performance problem.
Than you should at least tune your iscsi.conf to fit the eql requirements. I sent a working config from one of our Systems (but keep in mind this is multiple Gbit, not 10G). You can take the Manual for Citrix Xenserver Multipathing + Eql to get a Direction how it should look like since its using open-iscsi, too. http://en.community.dell.com/techcenter/extras/m/white_papers/20438058 Dont forget to check/set the NIC Settings ... regarding the HP Switch i am out, we where into EQL + Cisco 3750 and had lots of trouble until we replaced them with recommended Powerconnects. Am 02.12.2014 um 16:43 schrieb Stefan B: We can not hit kit installed thats is correct, the system are not support get i back from the installer. We use the fowling switchs Dell Bladecenter we use the Dell PowerEdge M I/O Aggregator connect with 10Gbit to HP Procruve 3800 switchs and then connected to the 1Gbit Equallogic's. Sometime its takes more than 30 / 45 seconds to get the data back, and the sql and webserver are waiting on this, are the some setting whate can give this problem ? On Tuesday, December 2, 2014 3:22:22 PM UTC+1, Stefan B wrote: We have 2 Equallogic Systems, And a Dell Servers. We have every server give a block device home dir , so the user data are on the home dir this is working great its format on xfs filesystem, and running iscsiadm version 2.0-870 with linux kernel 3.10.57 But when we logging on the server, the first time we do a dir command on the home dir, its take a long time when we get feedback on the dir , the next time is fast when we do a dir. Now we have users on this systems and this problem give not good performance on sql and websites an e-mail we are running on the server. Are the some information how i can fix ore maybe get this problem better under control ? I hope so that somebody can help me, i am searching for more than 3 weeks now. -- You received this message because you are subscribed to the Google Groups open-iscsi group. To unsubscribe from this group and stop receiving emails from it, send an email to open-iscsi+unsubscr...@googlegroups.com mailto:open-iscsi+unsubscr...@googlegroups.com. To post to this group, send email to open-iscsi@googlegroups.com mailto:open-iscsi@googlegroups.com. Visit this group at http://groups.google.com/group/open-iscsi. For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups open-iscsi group. To unsubscribe from this group and stop receiving emails from it, send an email to open-iscsi+unsubscr...@googlegroups.com. To post to this group, send email to open-iscsi@googlegroups.com. Visit this group at http://groups.google.com/group/open-iscsi. For more options, visit https://groups.google.com/d/optout.
Slow dir / Performance.
We have 2 Equallogic Systems, And a Dell Servers. We have every server give a block device home dir , so the user data are on the home dir this is working great its format on xfs filesystem, and running iscsiadm version 2.0-870 with linux kernel 3.10.57 But when we logging on the server, the first time we do a dir command on the home dir, its take a long time when we get feedback on the dir , the next time is fast when we do a dir. Now we have users on this systems and this problem give not good performance on sql and websites an e-mail we are running on the server. Are the some information how i can fix ore maybe get this problem better under control ? I hope so that somebody can help me, i am searching for more than 3 weeks now. -- You received this message because you are subscribed to the Google Groups open-iscsi group. To unsubscribe from this group and stop receiving emails from it, send an email to open-iscsi+unsubscr...@googlegroups.com. To post to this group, send email to open-iscsi@googlegroups.com. Visit this group at http://groups.google.com/group/open-iscsi. For more options, visit https://groups.google.com/d/optout.
Re: Slow / Performance problem.
Hit Kit is installed? Filesystem Mountparams? Output of iscsiadm -m session -P3 whould be helpful Am 02.12.2014 um 15:22 schrieb Stefan B: We have 2 Equallogic Systems, And a Dell Servers. We have every server give a block device home dir , so the user data are on the home dir this is working great its format on xfs filesystem, and running iscsiadm version 2.0-870 with linux kernel 3.10.57 But when we logging on the server, the first time we do a dir command on the home dir, its take a long time when we get feedback on the dir , the next time is fast when we do a dir. Now we have users on this systems and this problem give not good performance on sql and websites an e-mail we are running on the server. Are the some information how i can fix ore maybe get this problem better under control ? I hope so that somebody can help me, i am searching for more than 3 weeks now. -- You received this message because you are subscribed to the Google Groups open-iscsi group. To unsubscribe from this group and stop receiving emails from it, send an email to open-iscsi+unsubscr...@googlegroups.com mailto:open-iscsi+unsubscr...@googlegroups.com. To post to this group, send email to open-iscsi@googlegroups.com mailto:open-iscsi@googlegroups.com. Visit this group at http://groups.google.com/group/open-iscsi. For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups open-iscsi group. To unsubscribe from this group and stop receiving emails from it, send an email to open-iscsi+unsubscr...@googlegroups.com. To post to this group, send email to open-iscsi@googlegroups.com. Visit this group at http://groups.google.com/group/open-iscsi. For more options, visit https://groups.google.com/d/optout.
Re: Slow dir / Performance.
Hello, What Linux distro are you using?There are some common tweaks to the /etc/iscsid.conf and sysctl.conf files that help improve performance. This link covers how to configure RHEL with EQL. The same principles apply to any recent Linux distro. http://en.community.dell.com/cfs-filesystemfile/__key/communityserver-components-postattachments/00-19-86-14-22/TR1062_2D00_LinuxDeploy_2D00_v1-2.pdf Most distros locate all the files under /etc/iscsi. RHEL/CentOS have some in /etc/iscsi and the rest in /var/lib/iscsi Are you using MPIO? What FW are you running on the EQL storage? A common tweak I run to help improve read performance is blockdev. /sbin/blockdev --setra /dev/device This increases the read ahead value which is pretty low by default. It's covered in the PDF as well. Lastly have you opened a support case with Dell? They can review the diags and switch logs. Regards Don On Tue, Dec 2, 2014 at 9:06 AM, stefj...@gmail.com wrote: We have 2 Equallogic Systems, And a Dell Servers. We have every server give a block device home dir , so the user data are on the home dir this is working great its format on xfs filesystem, and running iscsiadm version 2.0-870 with linux kernel 3.10.57 But when we logging on the server, the first time we do a dir command on the home dir, its take a long time when we get feedback on the dir , the next time is fast when we do a dir. Now we have users on this systems and this problem give not good performance on sql and websites an e-mail we are running on the server. Are the some information how i can fix ore maybe get this problem better under control ? I hope so that somebody can help me, i am searching for more than 3 weeks now. -- You received this message because you are subscribed to the Google Groups open-iscsi group. To unsubscribe from this group and stop receiving emails from it, send an email to open-iscsi+unsubscr...@googlegroups.com. To post to this group, send email to open-iscsi@googlegroups.com. Visit this group at http://groups.google.com/group/open-iscsi. For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups open-iscsi group. To unsubscribe from this group and stop receiving emails from it, send an email to open-iscsi+unsubscr...@googlegroups.com. To post to this group, send email to open-iscsi@googlegroups.com. Visit this group at http://groups.google.com/group/open-iscsi. For more options, visit https://groups.google.com/d/optout.
Re: Could not logout of all requested sessions when working with centos 7
Thanks for reporting back. If this happens again, give us the /var/log/messages and the output of iscsiadm -m session -P 3 when the iscsiadm ….. —logout command is returning the errors you pasted below. On Nov 30, 2014, at 12:08 AM, Shay Katz shak...@gmail.com wrote: Hi, during the last week i have tried to reproduce the problem without success. I guess it is false alarm. Shay On Monday, November 10, 2014 8:51:00 AM UTC+2, Mike Christie wrote: Could you attach your /var/log/messages for when you removed the portals and when you ran the logout command? On Nov 7, 2014, at 12:56 AM, Shay Katz sha...@gmail.com wrote: Hi I have client (centos 7) with logged in sessions, [root@lgdrm1027 ~]# iscsiadm -m session tcp: [1] 10.206.12.5:3260,1 iqn.2008-05.com.xtremio:001e679efc4a (non-flash) tcp: [2] 10.205.12.5:3260,1 iqn.2008-05.com.xtremio:001e679efc4a (non-flash) tcp: [3] 10.206.12.6:3260,1 iqn.2008-05.com.xtremio:001e679efc4b (non-flash) tcp: [4] 10.205.12.6:3260,1 iqn.2008-05.com.xtremio:001e679efc4b (non-flash) tcp: [5] 10.206.12.15:3260,1 iqn.2008-05.com.xtremio:001e679efff6 (non-flash) tcp: [6] 10.205.12.15:3260,1 iqn.2008-05.com.xtremio:001e679efff6 (non-flash) tcp: [7] 10.206.12.16:3260,1 iqn.2008-05.com.xtremio:001e679efff7 (non-flash) tcp: [8] 10.205.12.16:3260,1 iqn.2008-05.com.xtremio:001e679efff7 (non-flash) After logging in the user remove the portals from the target, now when I am trying to logged out the operation fails And I didn't find how to remove them (There is no force flag): [root@lgdrm1027 ~]# iscsiadm -m node -u Logging out of session [sid: 1, target: iqn.2008-05.com.xtremio:001e679efc4a, portal: 10.206.12.5,3260] Logging out of session [sid: 2, target: iqn.2008-05.com.xtremio:001e679efc4a, portal: 10.205.12.5,3260] Logging out of session [sid: 3, target: iqn.2008-05.com.xtremio:001e679efc4b, portal: 10.206.12.6,3260] Logging out of session [sid: 4, target: iqn.2008-05.com.xtremio:001e679efc4b, portal: 10.205.12.6,3260] Logging out of session [sid: 5, target: iqn.2008-05.com.xtremio:001e679efff6, portal: 10.206.12.15,3260] Logging out of session [sid: 6, target: iqn.2008-05.com.xtremio:001e679efff6, portal: 10.205.12.15,3260] Logging out of session [sid: 7, target: iqn.2008-05.com.xtremio:001e679efff7, portal: 10.206.12.16,3260] Logging out of session [sid: 8, target: iqn.2008-05.com.xtremio:001e679efff7, portal: 10.205.12.16,3260] iscsiadm: Could not logout of [sid: 1, target: iqn.2008-05.com.xtremio:001e679efc4a, portal: 10.206.12.5,3260]. iscsiadm: initiator reported error (9 - internal error) iscsiadm: Could not logout of [sid: 2, target: iqn.2008-05.com.xtremio:001e679efc4a, portal: 10.205.12.5,3260]. iscsiadm: initiator reported error (2 - session not found) iscsiadm: Could not logout of [sid: 3, target: iqn.2008-05.com.xtremio:001e679efc4b, portal: 10.206.12.6,3260]. iscsiadm: initiator reported error (2 - session not found) iscsiadm: Could not logout of [sid: 4, target: iqn.2008-05.com.xtremio:001e679efc4b, portal: 10.205.12.6,3260]. iscsiadm: initiator reported error (2 - session not found) iscsiadm: Could not logout of [sid: 5, target: iqn.2008-05.com.xtremio:001e679efff6, portal: 10.206.12.15,3260]. iscsiadm: initiator reported error (2 - session not found) iscsiadm: Could not logout of [sid: 6, target: iqn.2008-05.com.xtremio:001e679efff6, portal: 10.205.12.15,3260]. iscsiadm: initiator reported error (2 - session not found) iscsiadm: Could not logout of [sid: 7, target: iqn.2008-05.com.xtremio:001e679efff7, portal: 10.206.12.16,3260]. iscsiadm: initiator reported error (2 - session not found) iscsiadm: Could not logout of [sid: 8, target: iqn.2008-05.com.xtremio:001e679efff7, portal: 10.205.12.16,3260]. iscsiadm: initiator reported error (2 - session not found) iscsiadm: Could not logout of all requested sessions [root@lgdrm1027 ~]# same scenario on centos 6.5 worked well. Shay -- You received this message because you are subscribed to the Google Groups open-iscsi group. To unsubscribe from this group and stop receiving emails from it, send an email to open-iscsi+...@googlegroups.com. To post to this group, send email to open-...@googlegroups.com. Visit this group at http://groups.google.com/group/open-iscsi. For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups open-iscsi group. To unsubscribe from this group and stop receiving emails from it, send an email to open-iscsi+unsubscr...@googlegroups.com. To post to this group, send email to open-iscsi@googlegroups.com. Visit this group at http://groups.google.com/group/open-iscsi. For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups
new comer questions on tgt,lio-utils and iscsitarget
hi I am new to iscsi ,have some questions in learning,quite appreciate for your help and time 1 \ both lio-utils and tgt are pure user space program? Both of them are using the kernel iscsi module ? So ,what is the difference between them? 2 \ Are there any guide documents on how to setup a iscsi target using both tgt and lio-utils? Thanks a lot for your help and time ! -- You received this message because you are subscribed to the Google Groups open-iscsi group. To unsubscribe from this group and stop receiving emails from it, send an email to open-iscsi+unsubscr...@googlegroups.com. To post to this group, send email to open-iscsi@googlegroups.com. Visit this group at http://groups.google.com/group/open-iscsi. For more options, visit https://groups.google.com/d/optout.
Re: iSCSI request keep rejected by microsoft iSCSI target because of write_same check
Mike == Michael Christie micha...@cs.wisc.edu writes: Mike, Mike This was the issue we worked with Microsoft on wasn’t it? You guys Mike figured out it was fixed in their target in a recent release Mike right? The issue we worked recently was wrt. the thin provisioning reporting. The WRITE SAME problem was that the target returns an iSCSI-specific error code rather than a check condition with ILLEGAL REQUEST. You were going to talk to MS. However, if somebody sends me the relevant INQUIRY strings for the MS target I'll add it to the WRITE SAME quirk list. -- Martin K. Petersen Oracle Linux Engineering -- You received this message because you are subscribed to the Google Groups open-iscsi group. To unsubscribe from this group and stop receiving emails from it, send an email to open-iscsi+unsubscr...@googlegroups.com. To post to this group, send email to open-iscsi@googlegroups.com. Visit this group at http://groups.google.com/group/open-iscsi. For more options, visit https://groups.google.com/d/optout.
Antw: Slow dir / Performance.
stefj...@gmail.com schrieb am 02.12.2014 um 15:06 in Nachricht 5a7097b3-0dd7-4c28-abbf-ff66800b8...@googlegroups.com: We have 2 Equallogic Systems, And a Dell Servers. We have every server give a block device home dir , so the user data are on the home dir this is working great its format on xfs filesystem, and running iscsiadm version 2.0-870 with linux kernel 3.10.57 But when we logging on the server, the first time we do a dir command on the home dir, its take a long time when we get feedback on the dir , the next time is fast when we do a dir. Are you sure it's related to iSCSI? Especially for the /home dire several different UIDs/GIDs are involved. We had a slow ls -l /home performance when the NIS server had a problem. Maybe you use LDAP or something else? Maybe try hdparm -t block_device to get a rough number how fast your block device can be read. I know there are better tests, but this one is quick and easy to perform... Now we have users on this systems and this problem give not good performance on sql and websites an e-mail we are running on the server. You are running a database (sql) via iSCSI? Are the some information how i can fix ore maybe get this problem better under control ? I hope so that somebody can help me, i am searching for more than 3 weeks now. -- You received this message because you are subscribed to the Google Groups open-iscsi group. To unsubscribe from this group and stop receiving emails from it, send an email to open-iscsi+unsubscr...@googlegroups.com. To post to this group, send email to open-iscsi@googlegroups.com. Visit this group at http://groups.google.com/group/open-iscsi. For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups open-iscsi group. To unsubscribe from this group and stop receiving emails from it, send an email to open-iscsi+unsubscr...@googlegroups.com. To post to this group, send email to open-iscsi@googlegroups.com. Visit this group at http://groups.google.com/group/open-iscsi. For more options, visit https://groups.google.com/d/optout.
