0
votes
0answers
98 views

Linux not buffering block I/O when the device is not “in use” (i.e. mounted)

I am installing new server and I've found an interesting issue. The server is running Fedora 19 (3.11.7-200.fc19.x86_64 kernel) and is supposed to host a few KVM/Qemu virtual servers (mail server, ...
3
votes
0answers
44 views

How can I measure disk cache churn on Linux? [duplicate]

Possible Duplicate: Is there a way to get Cache Hit/Miss ratios for block devices in Linux? I have a file server which serves out large (25GB-1TB+) files over the network from local ...
7
votes
1answer
167 views

Backup process flushes disk cache

I've got a backup process which reads quite a lot of data from disk, and therefore uses up all memory for disk cache, swapping off apps and other cached data in the process. There is no benefit to ...
5
votes
2answers
770 views

Linux disable disk cache for a single command

Our server is performing decently, but when backups or other scan processes run it will tank the entire server. Something like clamd will run and scan many files. While we expect slow performance, ...
0
votes
0answers
221 views

File-level SSD cache

My windows development environment gets pretty slow sometimes, it's a huge code base. I was thinking of speeding this up by using an SSD, but I want a way to do it while not requiring myself to carry ...
0
votes
1answer
3k views

What is read cache in “[sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA”?

I'm trying to figure out what the read cache part of the following message refers to: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA Is it "IDE drive's ...
0
votes
1answer
1k views

Optimum size for ISA server disk cache

Our ISA server administrator is saying this: How the ISA cache works is as follows: when the ISA server receives a request to access a website, the first step it takes is check through the ...
0
votes
1answer
1k views

How to disable disk read cache?

Is there a way to disable disk read cache on Windows? Disks are connected to a Dell PERC6/i controller. Is there a way to disable the controller's cache too?
13
votes
6answers
8k views

SATA Disks that handle write caching properly?

It's pretty common to see advice to disable the write cache on individual disks used for databases because otherwise some disks will acknowledge writes that haven't yet made it to the disk surface. ...