On 4/29/2022 10:20 AM, duh wrote:
On 4/27/22 11:05 PM, Greg Wooledge wrote:
....
Having skimmed over a number of the replies, and really not being qualified, may I just toss out a probably useless ideas to use the "sync" command. Looking at the 'man sync' shows at the bottom several variants or whatever to sync. Just a thought since when does the data get transferred to the disk versus just being held in memory or whatever? This is probably just a useless tangent based on my ignorance, but once in awhile it is possible to discover something when falls into a hole.
sync isn't about this. linux caches file system pages in memory - both content and metadata. sync is about forcing the changed pages back to disk, for example before shutting down. It's done automatically - maybe every 30 seconds (I'm not sure about linux on this). But sync does not change what programs see unless they use a direct to disk read, which is certainly not what's going on here.
