4
votes
Accepted
Disable all NFS Client cache on CentOS
I think that your problem is that the cacheing that's going on is not specifically NFS-related. Here's what I see on the network when I do an md5sum of a small NFS-mounted file for the second time in ...
- 80.1k
4
votes
iscsi multipath on CentOS 7, is it possible with existing partition
Configuring and adding multipath to existing iSCSI disk should not somehow affect data on it. You need to disconnect iSCSI target -> configure multipath on CenOS site -> and then reconnect iSCSI disk ...
- 5,570
3
votes
Accepted
VMware with 1gbs network interface with NFS in Netapp with 10gpbs and Control Flow
Flow control needs to be active on all host and switch ports to work.
The best solution would be to upgrade the host ports. With flow control active, you may experience head-of-line blocking when ...
- 10.7k
3
votes
Disable all NFS Client cache on CentOS
Assuming you're testing fpolicy and are simply looking for a way to reliably generate some traffic, I would skip the OS NFS stack completely and just use a python script using libnfs or something. ...
- 8,851
3
votes
Accepted
3
votes
Can a NetApp disk array be used as a JBOD?
My solution was a bit more complicated. I was able establish a JBOD on my NetApp DS14MK4 (14 x 450GB) using an HP Qlogic QLE2462 HBA on an Ubuntu 16.10 box using the following commands (some settings ...
- 31
3
votes
Accepted
Do I need btrfs scrub if a lower layer also scrubs?
There's no value in using your own scrubbing- in fact, it could cause a lower cache hit ratio and reduce performance on production IO.
Everything that you would protect against is already better ...
- 8,851
2
votes
Accepted
How to connect a Juniper EX4500 to netapp X1107A
You asked specifically for the "cheapest" way and I'm going to do you one better and make it simpler.
If the distance isn't too great, I'd get what's referred to as a "DAC (Direct Attached Copper)" ...
- 8,753
2
votes
Accepted
Exchange 2010 New database on a SAN - best practice
We organize our databases by storage group on a drive. So SG1 is on G: and SG2 is on I:. We have multiple databases per storage group and thus per drive.
We are running an all flash storage array so ...
- 688
2
votes
Windows files on SMB/CIFS server do not automatically have read locks
From samba documentation:
Strictly speaking, an SMB server should check for locks before every
read and write call on a file. Unfortunately, with the way fcntl()
works, this can be slow and may ...
- 49k
2
votes
AIX SMS Menu + Netapp Multipath cause BOS migration issues
For FC & FCoE with AIX 7.2 (all revisions & SPs) supported with NetApp ONTAP from 8.2 (7-Mode & Cluster Mode) to ONTAP 9.4.
To be precise here are supported configurations:
Host Volume ...
- 515
2
votes
rename() on NFS atomicity
Avoiding race conditions in NFS
This is always a fun challenge and the only work around I know of without rewritting applications is to mount the share with the options sync and change the NFS server ...
- 2,859
2
votes
Accepted
'SMB direct' disable on Windows 10 implications
If you're only using SMBv2, not SMBv3 then disabling SMB Direct will have no consequences as it's limited to version 3. If your new storage platform supports SMB Direct, you'll see increased CPU usage ...
- 1,211
2
votes
Same NFS share on different clients with different local users
Ownership of files can't be split like that. The files on the share can only have one owner (UID) and one group (GID). The names of those groups could be different on different clients (e.g. UID 1000 ...
- 281
2
votes
Storage space usage with thick provisioned disks
Who is correct?
It depends.
From the point of view of VMware, a thick-provisioned disk's size is fully reserved, thus its whole size will be marked as used and detracted from the free space on the ...
- 70.7k
2
votes
Accepted
Qlogic QLE8152 connect to a DS14 disk shelf
The Qlogic 8152 is an Ethernet NIC that can talk Fibre Channel over Ethernet but not native Fibre Channel. Fibre Channel uses different L1 and L2 protocols from Ethernet.
FCoE encapsulates FC frames ...
- 10.7k
1
vote
Storage space usage with thick provisioned disks
I am assuming based on the words you used in your question that you are talking about NFS datastores, please correct me if not and I’ll update the answer.
Assuming modern versions of VMware and a VAAI ...
- 8,851
1
vote
Accepted
AIX SMS Menu + Netapp Multipath cause BOS migration issues
It turns out there is no official support to NetApp MPIO during a DVD BOS Install. I've opened a support case at IBM and they confirmed it.
I was able though, to work around it using 'non-official' ...
- 127
1
vote
Unable to list new files on a cifs share with ls *
This problem can occur on Windows clients as well when running a buggy version of SMB2. Force the client to speak SMB3 and see if the problem goes away.
Find you samba configguration
$ sudo vi smb....
- 334
1
vote
Unable to list new files on a cifs share with ls *
Hmmm, I believe old pointers/soft links were broken or corrupted when the mount was moved, resulting in false pointers.
Remounting would update the paths allowing the wildcards to work properly again....
- 166
1
vote
RAID DP brain teaser
The 'DP' bit means Double Parity - and in this case will generally help to ensure your data is safe.
In the most basic Aggregate you need;
1 x Data disk
1 x Parity disk
1 x Double-Parity disk
1 x ...
- 102k
1
vote
Accepted
Powershell - checking if a file is a Linux symbolic link
I would just use try and catch. Attempt to do your work on a file, if it fails, gracefully skip to the next one.
- 8,851
1
vote
Windows files on SMB/CIFS server do not automatically have read locks
This behavior is controlled by smb oplock or leases. The client side is where this is defined. In other words. It depends on your application. All this in pesumption that ontap fully complies to smb ...
- 176
1
vote
Accepted
NetApp .Snapshots wont delete
Snapshots on Netapp take space based on how many blocks have changed since they were created. That can get high with time. You can safely delete any snapshot that's not in a locked state (for things ...
- 8,851
1
vote
How to connect a Juniper EX4500 to netapp X1107A
According to this data sheet, the NetApp 10GbE NICs only support SR fiber optic connections, with a maximum distance of 300 meters using OM3 cable and 550 meters using OM4 cable. It means the NIC does ...
- 31
1
vote
Accepted
linux + how to know the time details from df command
It depends on remote storage server, if it has some logs about nfs accesses. df command will show you only disk usage stats, nothing more. If you don't have any logs, you can prepare cronjob for every ...
- 2,663
1
vote
NFS mount in Windows - can't copy files with 600 permissions
Instead of using Windows to mount VMWare VM files, I'd just use the Netapp to directly write to tape.
Here's the guide for CDOT: https://library.netapp.com/ecmdocs/ECMP1196874/html/
Here's the guide ...
- 8,851
1
vote
Accepted
NetApp reconfigure aggregate
You do need to reconfigure, because you definitely want spare disks. That said, you don't want more than one aggregate with that few disks, and when using regular disks (non-SSD), you always want only ...
- 8,851
1
vote
How do I create NFS exports on virtualised NetApp from CLI?
Make sure the export policy you created is assigned to the volumes in question.
vol show -fields policy,junction-path
Also make sure the client has at least read access to the vserver's root volume. ...
- 61
1
vote
How do I create NFS exports on virtualised NetApp from CLI?
An export policy is just a container for export rules. Create a rule with vserver export-policy rule create to actually assign a host access to a share.
If you want to see what the effective ...
- 8,851
Only top scored, non community-wiki answers of a minimum length are eligible