Hi, As the subject mentions, is fwrite method atomic in PHP? What I mean by that is, does fwrite function acquire an implicit lock while writing or do I need to explicitly acquire an EXCLUSIVE lock on the file before I call fwrite? The problem I am having is that, I want to track user requests by logging simple request parameters such as user IP, request URI, etc. instead of inserting into the db for avoiding overheads. And I will have a cronjob read this data around midnight and write it into the database (when there is little load on the server). So, the questions I have is: 1. While writing this information, do I need to get an exclusive lock before writing? Say I have a 200 bytes string, and 2 people call fwrite at the same time with 2 strings, will they be written sequentually or will it mix these strings depending on the O/S IO buffer size. 2. While I am inserting this data into the database, I will have to lock the file, dump them into the database and empty it. So, this might make some users wait, which is something I am trying to avoid. But, in anycase I will need to have a secondary lock object which controls access to this log I guess, i.e. acquire secondary lock, rename the file to .tmp or something, release the lock, and in the meantime read from .tmp, parse it and put it in the db. Any ideas? Thanks... -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
