| sidebar | permalink | keywords | summary |
|---|---|---|---|
sidebar |
hu_ol_64.html |
host utilities, oracle, linux, 6.4, netapp, ontap |
Describes how to use Oracle Linux 6.4 with ONTAP |
You can use the ONTAP SAN host configuration settings to configure Oracle Linux 6.4 with ONTAP as the target.
If you decide to use SAN booting, it must be supported by your configuration. You can use the NetApp Interoperability Matrix Tool to verify that your OS, HBA, HBA firmware and the HBA boot BIOS, and ONTAP version are supported.
For Oracle Linux 6.4 the /etc/multipath.conf file must exist, but you do not need to make specific changes to the file. Oracle Linux 6.4 is compiled with all settings required to recognize and correctly manage ONTAP LUNs.
_include/hu/reuse_hu_enable_alua_steps_ol.adoc
_include/hu/reuse_hu_multipathing_non_asa.adoc
_include/hu/reuse_hu_non_asa_configuration_solo.adoc
# multipath -ll 3600a09803831347657244e527766394e dm-5 NETAPP,LUN C-Mode size=80G features='4 queue_if_no_path pg_init_retries 50 retain_attached_hw_handle' hwhandler='1 alua' wp=rw |-+- policy='round-robin 0' prio=50 status=active | |- 0:0:26:37 sdje 8:384 active ready running | |- 0:0:25:37 sdik 135:64 active ready running |-+- policy='round-robin 0' prio=10 status=enabled |- 0:0:18:37 sdda 70:128 active ready running |- 0:0:19:37 sddu 71:192 active ready running
The Oracle Linux 6.4 OS is compiled to recognize ONTAP LUNs and automatically set all configuration parameters correctly.
| Parameter | Setting |
|---|---|
detect_prio |
yes |
dev_loss_tmo |
"infinity" |
failback |
immediate |
fast_io_fail_tmo |
5 |
features |
"3 queue_if_no_path pg_init_retries 50" |
flush_on_last_del |
"yes" |
hardware_handler |
"0" |
no_path_retry |
queue |
path_checker |
"tur" |
path_grouping_policy |
"group_by_prio" |
path_selector |
"round-robin 0" |
polling_interval |
5 |
prio |
"ontap" |
product |
LUN.* |
retain_attached_hw_handler |
yes |
rr_weight |
"uniform" |
user_friendly_names |
no |
vendor |
NETAPP |
The following example shows how to correct an overridden default. In this case, the multipath.conf file defines values for path_checker and detect_prio that are not compatible with ONTAP LUNs.
If they cannot be removed because of other SAN arrays still attached to the host, these parameters can be corrected specifically for ONTAP LUNs with a device stanza.
defaults {
path_checker readsector0
detect_prio no
}
devices {
device {
vendor "NETAPP "
product "LUN.*"
path_checker tur
detect_prio yes
}
}
|
Note
|
To configure Oracle Linux 6.4 RedHat Enterprise Kernel (RHCK), use the recommended settings for Red Hat Enterprise Linux (RHEL) 6.4. |
The Oracle Linux 6.4 with ONTAP release has the following known issues:
| NetApp Bug ID | Title | Description | Bugzilla ID |
|---|---|---|---|
QLogic adapter resets are seen on OL6.4 and OL5.9 with UEK2 on controller faults such as takeover/giveback, and reboot |
QLogic adapter resets are seen on OL6.4 hosts with UEK2 (kernel-uek-2.6.39-400.17.1.el6uek) or OL5.9 hosts with UEK2 (kernel-uek-2.6.39 400.17.1.el5uek) when controller faults happen (such as takeover, giveback, and reboots). These resets are intermittent. When these adapter resets happen, a prolonged I/O outage (sometimes, more than 10 minutes) might occur until the adapter resets succeed and the paths' status are updated by dm-multipath. |
||
715217 |
Delay in path recovery on OL6.4 or OL5.9 hosts with UEK2 may result in delayed I/O resumption on controller or fabric faults |
When a controller fault (storage failover or giveback, reboots and so on) or a fabric fault (FC port disable or enable) occurs with I/O on Oracle Linux 6.4 or Oracle Linux 5.9 hosts with UEK2 Kernel, the path recovery by DM-Multipath takes a long time (4mins. to 10 mins). |
|
DM Multipath on OL6.4 & OL5.9 iSCSI with UEK2 kernel takes long time to update LUN path status after storage faults |
On systems running Oracle Linux 6 Update4 and Oracle Linux 5 Update9 iSCSI with Unbreakable Enterprise Kernel Release 2 (UEK2), a problem has been seen during storage fault events where DM Multipath (DMMP) takes around 15 minutes to update the path status of Device Mapper (DM) devices (LUNs). |
||
The SG_IO ioctl system call fails on dm-multipath devices after an FC fault on OL6.x and OL5.x hosts with UEK2 |
A problem is seen on Oracle Linux 6.x hosts with UEK2 kernel and Oracle Linux 5.x hosts with UEK2 kernel. The sg_* commands on a multipath device fail with EAGAIN error code (errno) after a fabric fault that makes all the paths in the active path group go down. This problem is seen only when there is no I/O occurring to the multipath devices. |
|
Note
|
For Oracle Linux (Red Hat compatible kernel) known issues, see the known issues for Red Hat Enterprise Linux (RHEL) 6.4. |