> From: Phil Pinkerton [mailto:pcpinker...@gmail.com] > > Question from a client: > > Does Subversion support checking out to a "network drive" > many miles away ? > > They are asking due to extremely slow checkouts across a WAN > to a NAS drive. I need a technical answer with regards to the > performance of subversion in this scenario. ( as if speaking > to a 10 year old ...mgmt haha )
Think of it this way. Any network activity is much slower than a local drive. A checkout _to_ a remote drive will have many network accesses for each temp file creation and deletion. With the current local copy format for SVN, that is at least two network accesses for each changed file. That is why the preferred best practice is to host the code on a server and check out from the remote machine directly. The client/server interactions have been optimized. To have a machine check out files to a remote drive will cause all sorts of network activity as that machine negotiates with the server and the remote drive. In Windows operating systems, networked drives are painfully slow when dealing with many small files. There are several network interactions for each file that is created/read/modified on a remote drive--including DNS lookup, network authentication, checksum validations, etc. Is this enough to get you started? Confidentiality Note: The information contained in this message, and any attachments, may contain proprietary and/or privileged material. It is intended solely for the person or entity to which it is addressed. Any review, retransmission, dissemination, or taking of any action in reliance upon this information by persons or entities other than the intended recipient is prohibited. If you received this in error, please contact the sender and delete the material from any computer.
