Why Shared Folder For Vmware Fusion And Mac Share Storage Space Minimize

#Why Shared Folder For Vmware Fusion And Share Storage Space Minimize Install Time And#

FUSE kernel file system sends the write to the user mode FUSE library and registered FUSE shared folders client.C. Linux dd sends write to Linux kernel and FUSE kernel file systemB. Shared Folders is a remote file system, so each file IO request has to be packaged and sent to the server running in the host desktop Workstation application to perform the file IO to the file on the host desktop.A. FUSE file systems are going to be slower due to the extra overhead of a round-trip per file IO request from the FUSE kernel file system to the user mode FUSE library and shared folders client. The Shared Folders client is a FUSE file system not a kernel mode file system client driver that we used to have and was difficult to support and required builds at install time and constant breakages with OS updates.

The host Workstation application has the Shared Folders server receives the reply and packages the result details and sends it back to the Shared Folders client.F. The host Workstation application has the Shared Folders server which receives the packet, decodes it, and issues the file IO to the correct file that is shared from the host.E. (Each request has 34 bytes of protocol header.)D.

Shared Folders client does not second guess what the application sends it and assumes that it knows how it wants to send the dataTo minimize the number of round-trips for each write for Shared Folders client a user can select a block size of 60k would be about the maximum transfer size per write request.However, what applications are running on your host with Workstation, the state and type of the disk on which the files reside, the system caching and memory usage all will affect and might inhibit performance. Selecting bs=x means the Shared Folders client receives data writes of that size x bytes. Shared Folders client gets file IO write requests as determined by the application (dd) and the FUSE kernel file system. The benefit for Shared Folders is that there isnвЂ™t any network latency for going to a truly remote machine. For each write operation there are a lot of steps when doing remote file IO. FUSE kernel file system sends the write result to the user mode application dd.

The use case was that operations on a local Git repository, which I mounted as shared folders between host and guest, timed out and corrupted my repository. Some comments:(1) I reported the problem because for me a use case broke after I switched from VMWare Fusion version 8 to version 10. However, there are some bottlenecks as shown above which cannot be avoided without significant trade-offs in design.Having said all of that I will still investigate what improvements we can make regardless.Thanks for the insights and many thanks for working on the problem. With Specifying small block sizes is going to result in lots of overhead and round-trips between the Shared Folders client and server and worse between kernel and user mode transitions, larger buffers might hit caching issues and memory issues, and system responsiveness might go down during the file operations.Shared Folders is not perfect, and you are right there is much more we can do to optimize some performance aspects, especially with read/write operations.

As said, that used to work fine for a long time that I was using VMWare Fusion 8 and was/is broken with version 10. Therefore, in my opinion high throughput is not the only requirement for shared folders performance but also low latencies. Do you agree on this conclusion?(3) Maybe Git writes (in some operations, I remember that some rebase operations failed) many small chunks in high frequency where high latencies caused a timeout in Git. Nevertheless, since throughput decreases significantly for small block sizes I assume latencies must be high for small block sizes. Of course, the tests measure the throughput while the latency for write operations may be actually the critical characteristic that broke (or still breaks) my use case.

Do you have an explanation for that?I don't think I have enough information yet to fully know why Git was broken from Fusion 8 to 10.Was your Linux version Ubuntu 16.04 consistent and the same for both? If so, what was it before with Fusion 8? It could mean you migrated from a Shared Folders kernel mode client to a FUSE client for example.I have fixed a few issues with the FUSE client over the time period but nothing I would expect to cause a break unless it was there but being masked by some errant behavior which was addressed.I will see if I can try a few scenarios out myself. As said, that used to work fine for a long time that I was using VMWare Fusion 8 and was/is broken with version 10. Therefore, in my opinion, high throughput is not the only requirement for shared folders performance but also low latencies. I have not looked into that kind of set up with Git.(3) Maybe Git writes (in some operations, I remember that some rebase operations failed) many small chunks in high frequency where high latencies caused a timeout in Git.

Why Shared Folder For Vmware Fusion And Share Storage Space Minimize Install Time And

Why Shared Folder For Vmware Fusion And Mac Share Storage Space Minimize