From 23b8d406f057f2dd91c3ea6ec3d80fcfae13d2f1 Mon Sep 17 00:00:00 2001 From: Helen Walsh Date: Tue, 6 Feb 2018 15:00:17 +0000 Subject: [PATCH] VMAX doc - Queens feature documentation Part 4 - Known issue around concurrent deletion of replicated volumes and minor amendments Change-Id: Ic06a4ee447872738ea8b51db741638b2f9043283 Partial-Bug: #1737735 --- .../block-storage/drivers/emc-vmax-driver.rst | 24 ++++++++++++------- 1 file changed, 15 insertions(+), 9 deletions(-) diff --git a/doc/source/configuration/block-storage/drivers/emc-vmax-driver.rst b/doc/source/configuration/block-storage/drivers/emc-vmax-driver.rst index 067836c1b2d..53c56964d9d 100644 --- a/doc/source/configuration/block-storage/drivers/emc-vmax-driver.rst +++ b/doc/source/configuration/block-storage/drivers/emc-vmax-driver.rst @@ -1028,10 +1028,9 @@ Assumptions, Restrictions and Pre-Requisites .. code-block:: console - # symaccess -sid -iscsi - enable chap | - disable chap | - set chap -cred -secret + # symaccess -sid -iscsi \ + {enable chap | disable chap | set chap} \ + -cred -secret # symaccess -sid 128 \ -iscsi iqn.1991-05.com.company.lcseb130 \ @@ -1058,8 +1057,6 @@ Settings and Configuration .. code-block:: ini [VMAX_ISCSI_DIAMOND] - image_volume_cache_enabled = True - volume_clear = zero volume_driver = cinder.volume.drivers.dell_emc.vmax.iscsi.VMAXISCSIDriver volume_backend_name = VMAX_ISCSI_DIAMOND san_ip = 10.10.10.10 @@ -1224,9 +1221,6 @@ Configure the source and target arrays vmax_srp = SRP_1 vmax_array = 000123456789 vmax_port_groups = [OS-FC-PG] - use_chap_auth = True - chap_username = my_username - chap_password = my_password volume_backend_name = VMAX_FC_REPLICATION replication_device = target_device_id:000197811111, remote_port_group:os-failover-pg, @@ -1388,6 +1382,18 @@ appearing that they all point to the one device. In order to do this, there needs to be multipath software running to manage writing to the multiple paths. +Known issues +------------ + +.. note:: + + There is a known issue which can occasionally occur when certain operations + on replicated volumes are invoked concurrently. This can cause some of + these operations to fail, but they should be successful on subsequent + attempts. Currently, this limitation applies to concurrent deletion of + replicated volumes, and concurrent management of existing volumes into a + replication volume type. + Volume retype - storage assisted volume migration ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~