For newer os revisions, use the inbox driver provided by the os vendor. Understanding vmware esxi queuing and the flasharray. This document is intended for customers who are using the qlogic host bus adapter hba driver in. For more information, see the documentation on software installation and configuration, and on the commandline interface. Typically we set 256default for qlogic, 4gbps cards. Get the hardware information for the hba to determine if the hba runs fine, including the pci registers mapping, capabilities description, and the driver in use. Ibm spectrum protect supported hbas for san device mapping. Using qlogic failover with different storage system types,page8 using the qlogic hba driver on a system with other multipathing products, page 9 troubleshooting hsv210 devices on linux, page 9 intended audience this document is intended for customers who are using the qlogic host bus adapter hba driver in failover mode on a system. Queues, queues and more queues virtualize applications. What is the hba queue depth, how to check the current queue depth. This value is identified by looking at the configured hba queue depth limit, which is generally 32 qlogic fc is the exception at 64, or software iscsi which is 128. To make the updates persistent across reboots, you must then create a new ram. If you are not satisfied with your hosts performance, change the maximum queue depth for the qlogic or emulex hba. How to get fibre channel hba information from linux.
The queue depth for all devices on the qlogic hba is a total of 4096. Need help installing hp ak344a or qlogic qle2560 hba in. The maximum queue depth describes the value of requests which is allowed to be in flight at maximum. On windows hosts, you can use the lputilnt utility to update the queue depth for emulex hbas and the sansurfer hba manager utility to update the queue depths for qlogic. For instance, a queue depth of 32 will allow you to have 128 luns 32 x 128 4096. Once youre in the qlogic bios setup, you will be able to see the current execution throttle queue depth and change it if you like. The maximum queue depth setting can significantly influence the storage performance. Each device will now consume 64 slots rather than 32 slots in the adapter queue which for qlogic is 4096. Home vmware default queue depth values for qlogic hbas for various esxiesx versions.
Fibre channel fc host bus adaptershba are interface cards that connects the host system to a fibre channel network or devices. You can use the qlogic hba management gui or commandline interface cli to modify the qlogic hba queue depth. For more information, see the documentation on software installation and configuration, and on. This table lists the default queue depth values for qlogic hbas for various.
Setting queue depth with qlogic hbas ibm knowledge center. Multipath configuration the virtual databases esxi host was configured by using vsphere native multipathing nmp. Schednumreqoutstanding dsnro value becomes the leading parameter. They are connected to a 3par storage through a qlogic 4gbits hba.
Spp offline mode boots a special linux os environment, thus the linux smart component are used, not the vmware smart components. I am installing a qlogic hp ak344a, also referred to as qle2560 hpcompaq storageworks single channel pcie 8 gb fibre channel host us adapter in a hp dl380 g5 running sles 10 sp2, oes 2 sp1, with kernel 2. What is the hba queue depth, how to check the current. How to increase the maximum queue depth per logical unit. The maximum scsi queue depth value, as determined by the microsoft port driver developer, is.
What is hba queue depth and how to check the current queue. The adapter software installer is a onestep program that allows you to install all adapter software and outofbox drivers, including both ethernet and storage drivers. If you increase the queue depth to 64 as is the new default in 5. From the esx server service console or a linux command prompt, run lputil. If you are a new customer, register now for access to product evaluations and purchasing capabilities. The device serial number, manufacturer, and worldwide name are initially recorded for each storage. Adjust queue depth for qlogic, emulex, and brocade hbas. How to set up the qlogic fibre channel fc host bus. Consider booting the esx server host from a linux administration cd that loads the emulex driver, then run lputil from there. Default queue depth values for qlogic hbas for various esxiesx versions. Use the esxcfgmodule command to change the q depth of the hba.
Updating qlogic hba queue depths on a linux host netapp. Compute design validation guidedell emc ready solutions. To make the updates persistent across reboots, you must then create a new ram disk image and reboot the host. So if you have a per device per lun queue depth of 32 you can support 128 luns at full queue depth, without queueing in the hba. Howto check queue depth of storage adapter or storage device. If there is more than one vm on the datastore then this value is the minimum of the hba device queue depth or the disk. This blog is to share our knowledge and expertise on linux system administration and vmware administration. How to check the current queue depth value for qlogic and emulex host bus adapter hba and change it. Isp2532based 8gb fibre channel to pci express hba rev 02 08. To adjust the maximum queue depth parameter, use the vcli commands. What is the hba queue depth and how to check the current queue depth value. The storage adapters with queue depth 25 are the bottom line which shows their limit when rebuild kicks in and good storage adapters ones with queue depth 600 or 1200. Lun queue depth the lun queue depth determines how many commands the hba is willing to accept and process per lun, if a single virtual machine is issuing io, the qd setting applies but when multiple vms are simultaneously issuing ios to the lun, the disk. Adjust queue depth for qlogic and emulex hbas if you are not satisfied with your hosts performance, change the maximum queue depth for the qlogic or emulex hba.
Schednumreqoutstanding which is a perdevice setting, which defaults to 32. When the qlogic host bus adapter hba driver is applied using the red hat enterprise linux 5 rhel5 update package, the updated driver and firmware version are shown at \var\log\messages. Any thoughts on the merits of changing the queue depth would be helpfull. Response queue count 512 total number of active commands 0 total number of interrupts 353067390 device queue depth 0x20 number of free request entries 267 number of mailbox timeouts 0 number of isp aborts 0 number of loop resyncs 0. Set the driver queue depth and timeouts using the esxcli command. Now i have the problem that the commvault simpana dedup process gets stuck regularly every few days. Configure your host that is running the linux operating system. These requests can be configured per single logical unit number lun that is accessed or based on the hba. With qlogic hba s on linux the queue depth is configured through the ql2xmaxqdepth module option. I want to run an experiment where i vary this parameter and measure the io performance. Hi, we have 2 hp bl460 g6 blades running sles11 sp3 and commvault simpana 10 sp8 media agent. Theres a kb artcile here that talks about emulex hbas but the proceedure is basically the. Using the qlogic hba driver for singlepath or multipath failover mode on linux systems 3. The issues can be caused by cabling, sfp, san switch, dwdm, hba or isl and those components will need to be analyzed and evaluated.
Here i will show you how to change the queue depth for a qlogic hba from. The two major manufacturers of fc hbas are qlogic and emulex and the drivers for many hbas are distributed inbox with the operating systems. Updating qlogic hba queue depths on a linux host identify the device queue depth parameter to be modified. Qlogic driver download qlogic sansurfer management. By joining our community you will have the ability to post topics, receive our newsletter, use the advanced search, subscribe to threads and access many other special features. Schednumreqoutstanding which is a perdevice setting, which. Vmware default this to 32 as this generally is the best for most configurations, however everyone has. Fixed reporting asynchronous events related to link transitions via the atio. What is the fiber channel hba queue depth, how to check the current queue depth value. Isp2532based 8gb fibre channel to pci express hba rev 02 05. Sdm uses the snia storage networking industry association host bus adapter hba api to perform san discovery. How to get fibre channel hba information from linux sosreport. Applications are confirmed to be functioning properly.
I want to set the adapter queue depth on a qlogic hba. When you lower this value, it throttles the hosts throughput and alleviates san contention concerns if multiple hosts are overutilizing the storage and are filling its command queue. Oracle iops and hba queue depth ardent performance computing. Dell emc host bus adapter users guide hba330 and external 12 gbps sas hba regulatory model. The maximum queue depth should be chosen carefully. Hp 82q 8gb dual port pcie fibre channel host bus adapter qlogic qmh2562 8gb fibre channel host bus adapter for cclass bladesystem. The queue depth indicates the number of io requests that are in flight, that have been requested but not yet been acknowledged to have been completed when communicating with a san storage. For exception cases or performance testing, use a queue depth of 256 to avoid possible queuing problems. You may want to change the queue depth for several reasons. It basically depends on the queued commands on the luns. Queue depth is for emulex cards and execution throttle is for qlogic cards. Do i have to edit the nf file or is there a command i can run to add the queue depth to both adapters in one go. The installation instructions indicate i need to install the linux.
What is qlogic execution throttle and how does it relate. You can do this for each hba, without having to reboot your host and press ctrlq each time. Each time this happens i see a lot of these qla2xxx. Complete the following steps to set the maximum queue depth. How to get the san environment information and statistics. Here i will show you how to change the queue depth for a qlogic hba from 32 to 64. Default queue depth values for qlogic hbas for various. Device configuration on sanattached devices is made simpler with the ibm spectrum protect san device mapping function sdm. Now with this raised to 64, this reduces the number of luns that may have this full queue depth value to 64 64 x 64 4096. For information about configuring dell emc hba multipathing using linux, see the linux administration documentation.
Please check the lun queue depth settings on the citrix server these need to be set to 32 divided by the number of active host paths to the luns all hos. What is the hba queue depth and how to check the current. The qlogic hba queue depth setting is no longer read by vsphere, therefore, it is not relevant when configuring a vsphere host with qlogic hbas. You can update the device queue depth of a qlogic driver on a linux host. How to check the current queue depth value of qlogic hostbusadapter hba and change the value. Queue depth ql2xmaxqdepth failover ql2xfailover load balancing type ql2xlbtype.
The maximum value refers to the queue depths reported for various paths to the lun. After adjusting the hba queue depth on a qlogic hba on a windows 2003 host, a performance monitoring tool such as perfmon for windows reveals that inputoutput io from the host to the filer improved on a per hba basis, but not on a per lun basis. If the settings does not stick, then do step 2 also. If that is increasing then it will make sense to reduce the execution throttle. The queue depth of the storage adapters varies depending on the brand, chipset used etc. Dell emc host connectivity guide for linux pn 300003865 rev 47 published. For small to midsize systems, use an hba queue depth of 32. Changing the queue depth for qlogic, emulex, and brocade hbas. If your company has an existing red hat account, your organization administrator can grant you access. Hp storageworks using the qlogic hba driver for single. Need to know hba qdepth, sansurfer not installed dell.
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