Nfs timeout

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nfs timeout

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I'm having trouble mounting a remote nfs mountpoint. Last edited by mfoley; at PM. Can you do Code:. Originally Posted by MadeInGermany. If you have a firewall, then consider allowing every port from to This is because the RPC prog can map to this port range.

I tried connecting a host on the same LAN, and it mounted just fine. I have to conclude that, if I can mount the nfs directory inside from behind, the firewall, but not outside the firewall, then the firewall must be the problem. But, I don't know what. I'll try opening that range, if I can, and post back. That did it! Last edited by mfoley; at AM. Tags nfstimeout Thread Tools. BB code is On. Smilies are On.Help answer threads with 0 replies.

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Reducing the timeout duration for NFS Mount. Find More Posts by paragkalra. Reason: spam removed. Tags nfstimeout Thread Tools.

nfs timeout

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How To Increase The VMware NFS Timeout When Using A NFS Datastore For Preseeding

Server Fault is a question and answer site for system and network administrators. It only takes a minute to sign up. I ran a siege test against a selection of images that live on this volume, and when it went down requests ended up timing out based on the apache Timeout value which was set to sec for this test. And this was better, but still took too long to fail: The first set of request timed out in about 30 seconds, but the next set took anywhere from to s.

I know the long-term solution is to move these to S3, but is it possible to reduce this to under s without affecting performance? Soft rw mounts can "cause silent data corruption in certain cases. Sign up to join this community. The best answers are voted up and rise to the top. Home Questions Tags Users Unanswered. Asked 4 years, 2 months ago. Active 4 years, 2 months ago. Viewed 9k times. We have a load-balanced web app that serves some images off an NFS mounted drive.

When the NFS server goes down, it ends up bringing all of the web instances down. Mark Wagner Why are you serving the files directly from a shared NFS server in the first place? It sounds like a single point of failure that shouldn't be there.

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Active Oldest Votes. Mark Wagner Mark Wagner According to the documentation, the timeo value is in 10th of seconds, and only applies if the soft option is enabled.What's new New posts New resources Latest activity. Resources Latest reviews Search resources. Log in Register. Search titles only. Search Advanced search…. New posts. Search forums. Forum Rules. Log in. Register Now! Register for the iXsystems Community to get an ad-free experience and exclusive discounts in our eBay Store.

JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding. Thread starter ByteTamer Start date May 26, Status Not open for further replies. ByteTamer Newbie. Joined May 10, Messages I'm a Freenas noob here having a great time exploring all the capabilities of Freenas. I'm running 8. I have gone through the documentation and set it just like the examples but it always times out without connecting.The performance measurement and tuning techniques we've discussed so far have only dealt with making the NFS server go faster.

Part of tuning an NFS network is ensuring that clients are well-behaved so that they do not flood the servers with requests and upset any tuning you may have performed. Server performance is usually limited by disk or network bandwidth, but there is no throttle on the rate at which clients generate requests unless you put one in place.

Add-on products, such as the Solaris Bandwidth Manager, allow you to specify the amount of network bandwidth on specified ports, enabling you to restrict the amount of network resources used by NFS on either the server or the client.

In addition, if you cannot make your servers or network any faster, you have to tune the clients to handle the network "as is. Slow server compensation The RPC retransmission algorithm cannot distinguish between a slow server and a congested network. If a reply is not received from the server within the RPC timeout period, the request is retransmitted subject to the timeout and retransmission parameters for that mount point.

It is immaterial to the RPC mechanism whether the original request is still enqueued on the server or if it was lost on the network. Excessive RPC retransmissions place an additional strain on the server, further degrading response time. Identifying NFS retransmissions Inspection of the load average and disk activity on the servers may indicate that the servers are heavily loaded and imposing the tightest constraint.

The NFS client-side statistics provide the most concrete evidence that one or more slow servers are to blame:. The call type demographics contained in the NFS-specific statistics are not of value in this analysis. The test for a slow server is having badxid and timeout of the same magnitude.

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In the previous example, badxid is nearly a third the value of timeout for connection-oriented RPC, and nearly half the value of timeout for connectionless RPC.

Connection-oriented transports use a higher timeout than connectionless transports, therefore the number of timeouts will generally be less for connection-oriented transports. The high badxid count implies that requests are reaching the various NFS servers, but the servers are too loaded to send replies before the local host's RPC calls time out and are retransmitted.

How to troubleshoot an NFS mount timeout?

In this case, the server is replying to all requests, including the retransmitted ones. The client is simply not patient enough to wait for replies from the slow server. If there is more than one NFS server, the client may be outpacing all of them or just one particularly sluggish node. If the server has a duplicate request cache, retransmitted requests that match a non-idempotent NFS call currently in progress are ignored.

Only those requests in progress are recognized and filtered, so it is still possible for a sufficiently loaded server to generate duplicate replies that show up in the badxid counts of its clients. Without a duplicate request cache, badxid and timeout may be nearly equal, while the cache will reduce the number of duplicate replies. With or without a duplicate request cache, if the badxid and timeout statistics reported by nfsstat on the client are of the same magnitude, then server performance is an issue deserving further investigation.

A mixture of network and server-related problems can make interpretation of the nfsstat figures difficult. A client served by four hosts may find that two of the hosts are particularly slow while a third is located across a network router that is digesting streams of large write packets.Turn on suggestions. Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type.

nfs timeout

Showing results for. Search instead for. Did you mean:. Contact Email us Tell us what you think. Log In. New Discussion. NFS timeout. Frequent Advisor. The issue is when we try and do a listing on a sub directory we get an PRC timeout. We can attempt again, gettting a timeout yet again, the thrid time we get the listing. The subdir has over files. Looking for Ideas?

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All forum topics Previous Topic Next Topic. Outstanding Contributor. The default is specified in the kernel. Try doubling it and see if this helps. Pete Pete. HPE Pro. What NFS version is the mount using?

Regards, Dave. HP-UX greta B. Ok, so you're running There are a few options but the first one I'd suggest is using TCP for the mount. If your network is congested and you're dropping packets, TCP should work better in that environment. Would this be a client issue or a server issue?

That's what I'm trying to determine. Once we know whether both client and server support TCP, the goal will be to get this filesystem mounted with TCP and see if that resolves your timeouts. The attached file has the output requested.By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.

The dark mode beta is finally here. Change your preferences any time. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. It mounts immidiately and then I start writing data to it. Now when I disconnect the nfs server from network,client hungs on write, prints. I need to reduce the time Write taking to return the Error, I tried using reducing timeo and checked other options of nfs mount but nothing worked.

Learn more. Timeout for nfs Ask Question. Asked 2 years, 11 months ago. Active 2 years, 11 months ago. Viewed times.

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Active Oldest Votes. I don't know it'll help or not, but manual suggest it can. Sylogista Sylogista 2 2 silver badges 9 9 bronze badges. Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Post as a guest Name. Email Required, but never shown.

nfs timeout

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