<div>
not many vms per lun.<br />
<br />
any limit advised by vmware to map single lun for max number of host,cluster ?
</div>


not many vms per lun.

any limit advised by vmware to map single lun for max number of host,cluster ?

<div>
Thanks,<br />
<br />
yes, 256 is max lun we can map!!<br />
<br />
so no challenge[with respect to lun latency] if we map single lun to multiple hosts from same/other cluster/vcenter like it may be 10000 or more.
</div>


Thanks,

yes, 256 is max lun we can map!!

so no challenge[with respect to lun latency] if we map single lun to multiple hosts from same/other cluster/vcenter like it may be 10000 or more.

<div>
No, your SAN guys need t look further as to what is the cause.
</div>


No, your SAN guys need t look further as to what is the cause.

<div>
I am waiting for few &nbsp;more information requested to san .<br />
<br />
Thanks @Andrew,@andyalder ,@compdigit44 -for all the supportive updates given above.<br />
will surely share the information to dig more into this ,coz I am &nbsp;keen to look exact reason behind this ?
</div>


I am waiting for few  more information requested to san .

Thanks @Andrew,@andyalder ,@compdigit44 -for all the supportive updates given above.
will surely share the information to dig more into this ,coz I am  keen to look exact reason behind this ?

<div>
Too many VMs, for your SAN.<br />
<br />
If performance is being affected on your VMs.
</div>


Too many VMs, for your SAN.

If performance is being affected on your VMs.

<div>
<div class="content wysiwyg-content">
informed by san team, there is lun latency increased because..<br />
<br />
Single Lun is mapped to multiple host and cluster ?<br />
<br />
Need to understand will that actually impact the performance ?<br />
<br />
&nbsp;if yes what is count for max host /cluster can be used to map single lun ?<br />
<br />
any impact due to size of lun mapped to multiple hots?<br />
<br />
best practice to look for lun latency if &nbsp;caused due to vmware or san config ?
</div>
</div>


informed by san team, there is lun latency increased because..

Single Lun is mapped to multiple host and cluster ?

Need to understand will that actually impact the performance ?

 if yes what is count for max host /cluster can be used to map single lun ?

any impact due to size of lun mapped to multiple hots?

best practice to look for lun latency if  caused due to vmware or san config ?

Lun mapping issue

Computer data storage, often called storage or memory, is a technology consisting of computer components and recording media used to retain digital data. In addition to local storage devices like CD and DVD readers, hard drives and flash drives, solid state drives can hold enormous amounts of data in a very small device. Cloud services and other new forms of remote storage also add to the capacity of devices and their ability to access more data without building additional data storage into a device.

Storage

Virtualization is the act of creating a virtual (rather than actual) version of something, including (but not limited to) a virtual computer hardware platform, operating system (OS), storage device, or computer network resources. Virtualization is usually the creation of a system that executes separate from the underlying hardware resources, or the creation of an entire desktop for systems located elsewhere, similar to thin clients.

Virtualization

The term "Backup" means the methods and processes involved to copy computer data (system data as well as application data) to media other than the ones where the data originally live (disk, tape, optical, cloud). "Restore" in turn means the methods and processes involved in data recovery, i. e., bringing back copied computer data to their original location. Backup/Restore primarily serves as a means of protection against data loss, be it due to disaster, corruption or sabotage. It can also be used for recovering data from an earlier point in time and even for cloning machines or applications. There is a wide variety of backup/restore software available, from expensive commercial products to free or open source tools.

Storage Software

VMware, a software company founded in 1998,  was one of the first commercially successful companies to offer x86 virtualization. The storage company EMC purchased VMware in 1994. Dell Technologies acquired EMC in 2016. VMware’s parent company is now Dell Technologies.

VMware has many software products that run on desktops, Microsoft Windows, Linux, and macOS, which allows the virtualizing of the x86 architecture.  Its enterprise software hypervisor for servers, VMware vSphere Hypervisor (ESXi), is a bare-metal hypervisor that runs directly on the server hardware and does not require an additional underlying operating system.

VMware

Storage devices include any device used for storing and retrieving digital information. Hard disk drives (HDDs) use one or more rigid ("hard") rapidly rotating disks (platters) coated with magnetic material. Data is accessed in a random-access manner, meaning that individual blocks of data can be stored or retrieved in any order and not only sequentially. The primary competing technology for secondary storage is flash memory in the form of solid-state drives (SSDs), but HDDs remain the dominant medium for secondary storage due to advantages in price per bit and per-device recording capacity. CD-RW (Compact Disc-ReWritable) is a digital optical disc storage format that allows information to be stored outside the mechanical HDD.