New to Vmware : Confused between relation of ESX/vSphere/Vcenter

[tomtom901]

Did you check the connect at power on box (not checked by default)?

[tomtom901]

You can do a bit of over provisioning. Might not get any quicker but you can do it.

[kiran123i]

hhhm lets see .. else i will drop plan to upgrade ..

[kiran123i]

Does they use software scsi adapter often in real for esxi to SAN connectivity in real life ?  or often its H/w HBA cards ? what is your observation

[tomtom901]

For iSCSI, in all my deployments I use the software adapter, I find that a hardware adapter with offload doesn't provide that much advantages over the software for the extra amount of money it costs.

[kiran123i]

Hey a question on linux DM multipathing, will i get the muktipathing with two nic cards in for iscsi lun ? Wondering if that is for HBAs only with 2 ports or 2 HBAs.... sounds silly ha

here is the conf

[root@kiran ~]# multipath -ll

Dec 03 14:10:23 | multipath.conf line 61, invalid keyword: path_checker

yellow (241e818a91a93124a) dm-0 ROCKET,IMAGEFILE

size=99G features='1 queue_if_no_path' hwhandler='0' wp=rw

`-+- policy='round-robin 0' prio=1 status=active

  `- 3:0:0:0 sdb 8:16 active ready running

[root@kiran ~]#

[root@kiran ~]#

[root@kiran ~]# cat /etc/multipath.conf |grep -v "#"

defaults {

        user_friendly_names yes

}

blacklist {

       wwid 26353900f02796769

        devnode "^(ram|raw|loop|fd|md|dm-|sr|scd|st)[0-9]*"

        devnode "^hd[a-z]"

}

multipaths {

        multipath {

                wwid                    241e818a91a93124a

                alias                   yellow

                path_grouping_policy    multibus

                path_checker            readsector0

                path_selector           "round-robin 0"

                failback                manual

                rr_weight               priorities

                no_path_retry           5

        }

}

[root@kiran ~]#

===

I have 2 nic cards

[root@kiran ~]# ifconfig

eth0      Link encap:Ethernet  HWaddr 00:0C:29:10:76:F4

          inet addr:192.168.1.131  Bcast:192.168.1.255  Mask:255.255.255.0

          inet6 addr: fe80::20c:29ff:fe10:76f4/64 Scope:Link

          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1

          RX packets:1336687 errors:0 dropped:0 overruns:0 frame:0

          TX packets:515363 errors:0 dropped:0 overruns:0 carrier:0

          collisions:0 txqueuelen:1000

          RX bytes:1927244977 (1.7 GiB)  TX bytes:35823630 (34.1 MiB)

          Interrupt:19 Base address:0x2024

eth1      Link encap:Ethernet  HWaddr 00:50:56:34:00:1C

          inet addr:192.168.1.171  Bcast:192.168.1.255  Mask:255.255.255.0

          inet6 addr: fe80::250:56ff:fe34:1c/64 Scope:Link

          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1

          RX packets:3556 errors:0 dropped:0 overruns:0 frame:0

          TX packets:829 errors:0 dropped:0 overruns:0 carrier:0

          collisions:0 txqueuelen:1000

          RX bytes:469908 (458.8 KiB)  TX bytes:79297 (77.4 KiB)

          Interrupt:19 Base address:0x20a4

lo        Link encap:Local Loopback

          inet addr:127.0.0.1  Mask:255.0.0.0

          inet6 addr: ::1/128 Scope:Host

          UP LOOPBACK RUNNING  MTU:16436  Metric:1

          RX packets:31 errors:0 dropped:0 overruns:0 frame:0

          TX packets:31 errors:0 dropped:0 overruns:0 carrier:0

          collisions:0 txqueuelen:0

          RX bytes:2436 (2.3 KiB)  TX bytes:2436 (2.3 KiB)

[root@kiran ~]#

Thanks

[kiran123i]

Hey Tom,

Can u tell me if its ok to have a exsi cluster of 3 nodes with ESX os in Local disk of the dell/Sun servers with say raid 0 for local disk & all the VMs on the netapps NFS storage ?

thanks

[tomtom901]

That's OK. Once ESXi is fully booted, (almost) everything will run from memory. Even better would be (think green IT ) to use an 8GB USB stick for the ESXi OS. If you pick a decent one, the boot process of ESXi will be faster too.

[kiran123i]

Hey,

re-checking, does that nfs share is ok for OS ? Coz i guess that is NFS & not vmfs ...

Thanks,

[tomtom901]

NFS is also supported to run guests. It handels some things differently than VMFS but it is definitely possible. Many people say that NFS isn't a decent storage filesystem for vSphere, but NetApp disagrees I also think that it's a good solution, however I still prefer VMFS over NFS. But in your case, it is be possible and using NFS should not hold you back.

[kiran123i]

cool .. thanks for the info & sharing your ideas