What is the fiber channel hba queue depth, how to check the current queue depth value. For small to midsize systems, use a hba queue depth of 32. The maximum number of fcp commands that can queue to an emulex adapter. The emulex hba support the following options to influence the queue depth settings.
Isp2532based 8gb fibre channel to pci express hba rev 02 08. You can update the queue depths of an emulex hba on a linux host. 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. For suse linux enterprise server 9 or later, add the line to the etcnf. Click pdf manual to download installation, configuration, and troubleshooting information. Understanding vmware esxi queuing and the flasharray. If you are not satisfied with your hosts performance, change the maximum queue depth for the qlogic or emulex hba. Vmware recommends 256, which looks like the middle range. For small to midsize systems, use an hba queue depth of 32. The maximum queue depth describes the value of requests which is allowed to be in flight at maximum. This table lists the default queue depth values for qlogic hbas for various esxi esx.
Download the driver file for the driver to a local disk. For red hat enterprise linux 4 or later, add the line to the etcnf file. Upgrade hba bios and firmware in linux emulex card. The lpfc driver has been upstream for many years and can be readily found in the distributions. How to configure emulex fibre channel hbas with hyperv virtual fibre channel on microsoft windows. Changing the queue depth of emulex hba for changing maximum queue depth settings in emulex hba on servers running rhel 6 loading and unloading lpfc module is needed.
How to change emulex hba queue depth options in rhel 6. The hba driver is not configured according to the best practices. How can i display current queue depth of emulex hbas. Hopefully emulex will allow us to increase the queue depth of their hbas up to 64 as well sometime in the future, but in the meantime we can leave the default 64 setting for qlogic and default 32 setting for emulex as sioc will.
This project is a development area for a linux device driver for emulex fibre channel hbas, targetting the linux 2. How to prevent disabled repositories from being downloaded into the yum cache. 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. However, i am unable to change parameters on the fly and have to reboot for changes to take effect. Changing the queue depth for qlogic, emulex, and brocade hbas. The maximum queue depth setting can significantly influence the storage performance. The queue depth of the storage adapters varies depending on the brand, chipset used etc. The configuration of the emulex 8 gb hbas is fully integrated in the uefi interface which results in an easy to use and intuitive way to set up the adapter. Ibm system p and bladecenter js running the linux operating system. To start out, id like to compare the default queue size of 32 with an increased setting of 64.
In the host configuration guide, on page 59, it talks about setting the lun queue depth on the emulex hba to 128. Emulex corporation thorx lightpulse fibre channel host adapter rev 01. Configure your host running the linux operating system to allow a maximum queue depth of four. Install the management utilities as described in the emulex driver and utilities user guide. Ive looked at the emulex vmware pdf but i cant find anything regarding the actual linux setting one would use in the nf file. Oraclebranded emulex hba queuedepth oracle community.
Mitigating the effects of storage array migration for linux hosts. Emulex network adapters are highperformance adapters that consolidate traffic for networking, fibre channel and fcoe storage. How to get fibre channel hba information from linux. Install the driver for linux as described in the emulex driver and utilities user guide. What is the hba queue depth and how to check the current queue depth value. This product supports the following emulex fc hbas. This guide was created as an overview of the linux operating system, geared toward new users as an exploration tour and getting started guide, with exercises at the end of each chapter.
Unfortunately, at this time emulex are recommending that a device queue depth of 32 is the sweet spot for their hbas. From the esx server service console or a linux command prompt, run lputil. The hbas provide the ability to build highperformance, highly available sans and are easy to set up and integrate into existing san configurations. Update the queue depths by adding the queue depth parameters to the etcnf file for a red hat enterprise linux 5. Below is the steps for uprgade hba bios and firmware for emulex card. Sioc considerations with mixed hba environments vmware. How to get the san environment information and statistics. This application note explains how to connect directly emulex fibre channel host bus adapters hbas to fibre channel storage from a virtual machine vm running windows server 2008 r2 x64. The hba driver is not configured according to the best. How to change the queue depth configuration of qlogic. How to set up the qlogic fibre channel fc host bus. You are not directly subscribed to this bugs notifications. Emulex 8gb fc singleport and dualport hbas product guide.
Queue depth target queue depth total number of luns mapped from the array in windows environment storport hba drivers have changed important behavior about qd over scsiport drivers. Downloads and documentation is available on fibre channel host bus adapters product page or on documents and downloads. Furthermore, to prevent a single vm from monopolizing a target, the vmkernel controls the max number of outstanding scsi commands from a vm to a lun by using the contents of the parameter disk. These requests can be configured per single logical unit number lun that is accessed or based on the hba. For queue depth there are two settings that can be adjusted. Schednumreqoutstanding which is a perdevice setting, which. What is the hba queue depth and how to check the current. Includes fcoe converged network adapter cna and host bus adapters hba. The issues can be caused by cabling, sfp, san switch, dwdm, hba or isl and those components will need to be analyzed and evaluated. Ensure that the scsi timeout value for the emulex hba on a linux host is. However, since your vhbas also have vnx, you need to go with lowest value which would be of vnx.
How to configure emulex fibre channel hbas with hyperv. To adjust the maximum queue depth parameter, use the vcli commands. After adding the entry in nf file, recreated initrd image and rebooted system with new image. Dell emc host connectivity guide for linux pn 300003865 rev 47 published. The default queue depth value for brocade adapters is 32. Linux 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. Copy the files to server u have to down load 3 files a. Isp2532based 8gb fibre channel to pci express hba rev 02 05. Unparalleled manageability, reliability, performance and ease of deployment streamlined installation and management, unrivaled scalability and industryleading virtualization support make the dualchannel emulex lightpulse lpe12002 fibre channel host bus adapter hba an ideal solution for enterprise, mixedoperating system os and virtual server environments. Adjust queue depth for qlogic, emulex, and brocade hbas. We can down load this utility from emulex support site. Queues, queues and more queues virtualize applications. My oracle support provides customers with access to over a million knowledge articles and a vibrant support community of peers and oracle experts. Down load the correct firmware and bios file from emulex support site and down load hbanyware utility kit which contains one command manager.
Queue depth of hba a default queue depth of 16 and 30 for the qlogic and emulex fc adapters, respectively. Consider booting the esx server host from a linux administration cd that loads the emulex driver, then run lputil from there. Dell emc host connectivity guide for linux dell technologies. After adding the entry in nf file, recreated initrd. 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 hbas. The maximum value refers to the queue depths reported for various paths to the lun.
Uses command completion time to control queue depth. 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. All hosts should have the queue depths set to similar values to give equal access to all hosts. To make the updates persistent across reboots, you must then create a new ram disk. For exception cases or performance testing, use a queue depth of 256 to avoid possible queuing problems. I want to run an experiment where i vary this parameter and measure the io performance. Oracle iops and hba queue depth ardent performance computing. What is the hba queue depth, how to check the current queue depth. With qlogic hba s on linux the queue depth is configured through the ql2xmaxqdepth module option. Manage hba with one command manager utility hpacmd. 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.
Emulex hba support the following options to influence the queue depth. Hba queue depth setting is fully depended upon configuration queue depth on storage, lun presentation per hba etc. For more advanced trainees it can be a desktop reference, and a collection of the base knowledge needed to proceed with system and network administration. The default queue depth value for emulex adapters has not changed for all versions of esxiesx released to date. Emulex hba capture is fully supported on lpe12k, lpe16k, lpe31k, lpe32k and lpe35k series adapters.
Isp2432 request queue 0x80b080000, response queue 0x80b040000 request queue count 4096, response queue count 512 total number of active. To change the hba queue depth settings, include the following line to the hba driver module configuration file section 2. Howto check queue depth of storage adapter or storage device. Contribute to torvaldslinux development by creating an account on github. What is hba queue depth and how to check the current queue. Linux lpfc driver download while running an ubuntu kernel not a mainline or thirdparty kernel please enter the following command in a terminal window. Products sold prior to the november 1, 2015 separation of hewlettpackard company into hewlett packard enterprise company and hp inc. I have an oel server connected via fibre to a netapp san. Emulex drivers for linux for lightpulse adapters user. For emulex, xtremio best practice recommendation is to set hba queue depth to 8192default, and lun queue depth to 128. Updating emulex hba queue depths on a linux host netapp. 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. Lun queue depth, and hba queue depth io throttle count.
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