Dominik L. Borkowski wrote: > On Monday 30 June 2008 17:18:25 Ken A wrote: >> The problem went away when I turned off nops, reduced queue depth and >> cmds max and used the open-iscsi-2.0-869.2.tar.gz source. > > Would you be willing to share your initiator's final working configuration? > > thanks, > dom > > >
I am not sure this is final, but it is working well. The only things changed from the default are nops, queue_depth and cmds_max. HTH, Ken # # Open-iSCSI default configuration. # Could be located at /etc/iscsi/iscsid.conf or ~/.iscsid.conf # # Note: To set any of these values for a specific node/session run # the iscsiadm --mode node --op command for the value. See the README # and man page for iscsiadm for details on the --op command. # ################ # iSNS settings ################ # Address of iSNS server #isns.address = 192.168.0.1 #isns.port = 3205 ############################# # NIC/HBA and driver settings ############################# # open-iscsi can create a session and bind it to a NIC/HBA. # To set this up see the example iface config file. #***************** # Startup settings #***************** # To request that the iscsi initd scripts startup a session set to "automatic". # node.startup = automatic # # To manually startup the session set to "manual". The default is manual. node.startup = manual # ************* # CHAP Settings # ************* # To enable CHAP authentication set node.session.auth.authmethod # to CHAP. The default is None. #node.session.auth.authmethod = CHAP # To set a CHAP username and password for initiator # authentication by the target(s), uncomment the following lines: #node.session.auth.username = username #node.session.auth.password = password # To set a CHAP username and password for target(s) # authentication by the initiator, uncomment the following lines: #node.session.auth.username_in = username_in #node.session.auth.password_in = password_in # To enable CHAP authentication for a discovery session to the target # set discovery.sendtargets.auth.authmethod to CHAP. The default is None. #discovery.sendtargets.auth.authmethod = CHAP # To set a discovery session CHAP username and password for the initiator # authentication by the target(s), uncomment the following lines: #discovery.sendtargets.auth.username = username #discovery.sendtargets.auth.password = password # To set a discovery session CHAP username and password for target(s) # authentication by the initiator, uncomment the following lines: #discovery.sendtargets.auth.username_in = username_in #discovery.sendtargets.auth.password_in = password_in # ******** # Timeouts # ******** # # See the iSCSI REAME's Advanced Configuration section for tips # on setting timeouts when using multipath or doing root over iSCSI. # # To specify the length of time to wait for session re-establishment # before failing SCSI commands back to the application when running # the Linux SCSI Layer error handler, edit the line. # The value is in seconds and the default is 120 seconds. node.session.timeo.replacement_timeout = 120 # To specify the time to wait for login to complete, edit the line. # The value is in seconds and the default is 15 seconds. node.conn[0].timeo.login_timeout = 15 # To specify the time to wait for logout to complete, edit the line. # The value is in seconds and the default is 15 seconds. node.conn[0].timeo.logout_timeout = 15 # Time interval to wait for on connection before sending a ping. node.conn[0].timeo.noop_out_interval = 0 # To specify the time to wait for a Nop-out response before failing # the connection, edit this line. Failing the connection will # cause IO to be failed back to the SCSI layer. If using dm-multipath # this will cause the IO to be failed to the multipath layer. node.conn[0].timeo.noop_out_timeout = 0 # To specify the time to wait for abort response before # failing the operation and trying a logical unit reset edit the line. # The value is in seconds and the default is 15 seconds. node.session.err_timeo.abort_timeout = 15 # To specify the time to wait for a logical unit response # before failing the operation and trying session re-establishment # edit the line. # The value is in seconds and the default is 30 seconds. node.session.err_timeo.lu_reset_timeout = 20 #****** # Retry #****** # To speficy the number of times iscsiadm should retry a login # to the target when we first login, modify the following line. # The default is 4. Valid values are any integer value. This only # affects the initial login. Setting it to a high value can slow # down the iscsi service startup. Setting it to a low value can # cause a session to not get logged into, if there are distuptions # during startup or if the network is not ready at that time. node.session.initial_login_retry_max = 4 ################################ # session and device queue depth ################################ # To control how many commands the session will queue set # node.session.cmds_max to an integer between 2 and 2048 that is also # a power of 2. The default is 128. # node.session.cmds_max = 128 node.session.cmds_max = 16 # To control the device's queue depth set node.session.queue_depth # to a value between 1 and 128. The default is 32. # node.session.queue_depth = 32 node.session.queue_depth = 8 #*************** # iSCSI settings #*************** # To enable R2T flow control (i.e., the initiator must wait for an R2T # command before sending any data), uncomment the following line: # #node.session.iscsi.InitialR2T = Yes # # To disable R2T flow control (i.e., the initiator has an implied # initial R2T of "FirstBurstLength" at offset 0), uncomment the following line: # # The defaults is No. node.session.iscsi.InitialR2T = No # # To disable immediate data (i.e., the initiator does not send # unsolicited data with the iSCSI command PDU), uncomment the following line: # #node.session.iscsi.ImmediateData = No # # To enable immediate data (i.e., the initiator sends unsolicited data # with the iSCSI command packet), uncomment the following line: # # The default is Yes node.session.iscsi.ImmediateData = Yes # To specify the maximum number of unsolicited data bytes the initiator # can send in an iSCSI PDU to a target, edit the following line. # # The value is the number of bytes in the range of 512 to (2^24-1) and # the default is 262144 node.session.iscsi.FirstBurstLength = 262144 # To specify the maximum SCSI payload that the initiator will negotiate # with the target for, edit the following line. # # The value is the number of bytes in the range of 512 to (2^24-1) and # the defauls it 16776192 node.session.iscsi.MaxBurstLength = 16776192 # To specify the maximum number of data bytes the initiator can receive # in an iSCSI PDU from a target, edit the following line. # # The value is the number of bytes in the range of 512 to (2^24-1) and # the default is 131072 node.conn[0].iscsi.MaxRecvDataSegmentLength = 131072 # To specify the maximum number of data bytes the initiator can receive # in an iSCSI PDU from a target during a discovery session, edit the # following line. # # The value is the number of bytes in the range of 512 to (2^24-1) and # the default is 32768 # discovery.sendtargets.iscsi.MaxRecvDataSegmentLength = 32768 # To allow the targets to control the setting of the digest checking, # with the initiator requesting a preference of enabling the checking, uncomment# one or both of the following lines: #node.conn[0].iscsi.HeaderDigest = CRC32C,None #node.conn[0].iscsi.DataDigest = CRC32C,None # # To allow the targets to control the setting of the digest checking, # with the initiator requesting a preference of disabling the checking, # uncomment one or both of the following lines: #node.conn[0].iscsi.HeaderDigest = None,CRC32C #node.conn[0].iscsi.DataDigest = None,CRC32C # # To enable CRC32C digest checking for the header and/or data part of # iSCSI PDUs, uncomment one or both of the following lines: #node.conn[0].iscsi.HeaderDigest = CRC32C #node.conn[0].iscsi.DataDigest = CRC32C # # To disable digest checking for the header and/or data part of # iSCSI PDUs, uncomment one or both of the following lines: #node.conn[0].iscsi.HeaderDigest = None #node.conn[0].iscsi.DataDigest = None # # The default is to never use DataDigests and to allow the target to control # the setting of the HeaderDigest checking with the initiator requesting # a preference of disabling the checking. #************ # Workarounds #************ # Some targets like IET prefer after an initiator has sent a task # management function like an ABORT TASK or LOGICAL UNIT RESET, that # it does not respond to PDUs like R2Ts. To enable this behavior uncomment # the following line (The default behavior is Yes): node.session.iscsi.FastAbort = Yes # Some targets like Equalogic prefer that after an initiator has sent # a task management function like an ABORT TASK or LOGICAL UNIT RESET, that # it continue to respond to R2Ts. To enable this uncomment this line # node.session.iscsi.FastAbort = No Ken -- Ken Anderson Pacific.Net --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "open-iscsi" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/open-iscsi -~----------~----~----~----~------~----~------~--~---
