NAS and NFS

Published: 30 Apr 2001

Mr. Farley: Why did a vendor suggest Network Attached Storage for a relational database like Oracle? These files are open all the time. NFS v3 transport is UDP/2049, a connectionless protocol. How can a DB commit be guaranteed? Is NFS WRITE+COMMIT enough? So, write validation is a file system application layer function? Seems like too much protocol overhead to perform like SCSI over Fibre.
Well, this gets right into the sticky wicket. There are potential problems with UDP and relational databases as you describe. The question is how can a stateless protocol like UDP work with statefull processes like relational databases have? It seems to me like it's a little bit more than just a "mileage may vary" answer. I have not heard of anybody's database blowing up from using NAS and NFS, but that doesn't mean it can't happen. It's also one of the main reasons Network Appliance, for instance, is developing DAFS, so they can get guaranteed, in-order delivery of relational database file-level I/O.

Dig Deeper on NAS devices

UDP (User Datagram Protocol) UDP (User Datagram Protocol) is an alternative communications protocol to Transmission Control Protocol (TCP) used primarily for establishing low-latency and loss-tolerating connections between applications on the internet.

Network File System (NFS) The Network File System (NFS) is a client/server application that lets a computer user view and optionally store and update files on a remote computer as though they were on the user's own computer. The NFS protocol is one of several distributed file system standards for network-attached storage (NAS).

Active path testing a compelling network performance monitoring tool You don't have to be Facebook to use its NetNORAD active path testing network performance monitoring tool. Here's what you need to know.

Citrix HDX uses both UDP and TCP

The Layer 4 protocols behind PCoIP and HDX: Which is better for VDI? VMware uses UDP for its remote desktop protocol, PC-over-IP, and Citrix uses TCP for HDX. Consider the pros and cons of these technologies for your VDI environment.

EMC, NetApp clash over VMware There are lots of interesting donnybrooks going on in this industry at any one moment, but EMC-NetApp is like the Red Sox-Yankees rivalry: imbued with a sense of historical inevitability, and ...

Have a question for an expert?

Please add a title for your question

Get answers from a TechTarget expert on whatever's puzzling you.

Meet all of our Storage Technology experts

View all Storage Technology questions and answers

SearchDisasterRecovery

NAS and NFS

Dig Deeper on NAS devices

Have a question for an expert?

Start the conversation

0 comments

Please create a username to comment.

-ADS BY GOOGLE

SearchDisasterRecovery

Zerto plays big role in McKesson's disaster recovery plan

Why you should have a disaster recovery testing plan in place

Post-disaster recovery, don't overlook user connectivity

SearchDataBackup

Create an effective data backup strategy from scratch

Druva expands on AWS backup, moves S3 snaps across regions

SaaS backup services deliver data protection for SaaS apps

SearchConvergedInfrastructure

HCI storage adoption rises as array sales slip

Microsoft Storage Spaces Direct simplifies converged, HCI storage

Explore compelling benefits of hyper-converged infrastructure

Dig Deeper on NAS devices

Have a question for an expert?

Start the conversation

0 comments

Register

Login

Forgot your password?

Your password has been sent to:

Please create a username to comment.