Free Software Linux

Sharing files over network have been very usual network activity in any type of networks whether private or public network. NFS is only way of sharing files located from server over a network of hosts. Here’s a quick run down on how top mount an existing read-only NFS share folder over a... [[ This is a content summary only. Visit my website for full links, other content, and more! ]]

"I'm please to announce [the] POHMEL high performance network filesystem. POHMELFS stands for Parallel Optimized Host Message Exchange Layered File System," began Evgeniy Polyakov, explaining: "This is a high performance network filesystem with local coherent cache of data and metadata. Its main goal is distributed parallel processing of data. Network filesystem is a client transport. POHMELFS protocol was proven to be superior to NFS in lots (if not all, then it is in a roadmap) operations."

"These patches add local caching for network filesystems such as NFS," began David Howells describing an updated set of thirty-seven patches to introduce FS-Cache. When asked how the patches affect performance, he noted that this was dependent on the use case, highlighting issues when dealing with lots of metadata, "getting metadata from the local disk fs is slower than pulling it across an unshared gigabit ethernet from a server that already has it in memory." David continued "these points don't mean that fscache is no use, just that you have to consider carefully whether it's of use to *you* given your particular situation, and that depends on various factors," adding, "note that currently FS-Caching is disabled for individual NFS files opened for writing as there's no way to handle the coherency problems thereby introduced." He concluded with a number of simple performance benchmarks. read more

"The problem with swap over network is the generic swap problem: needing memory to free memory. Normally this is solved using mempools, as can be seen in the BIO layer," explained Peter Zijlstra. "Swap over network has the problem that the network subsystem does not use fixed sized allocations, but heavily relies on kmalloc(). This makes mempools unusable."