My Linux server spends a lot of time computing LUKS encryption. Is there any way to hardware accelerate it (with a PCI express card for example)?
Is there any way to find out sometimes when the server load is high, what process and what activity cause that ? I have a shared webserver and mailserver (HTTP, DNS, SMTP, IMAP, POP, FTP,...) and sometimes the load is very high. 25-50 or more. How can I find out what cause that, and what can I do to give normal performance continuously ?
I have to repair a Windows domain controller, what can't boot. Secondary domain controller doesn't exists. Is there a way to install a new domain controller and bring the AD from the old offline DC with hard drive access ?
My bosses want an auction email account in Exchange 2007. There would be an address (mailbox), that can get email only during a certain time frame. Before and after that it rejects the email?
Is this possible?
I have a server with 8TB data, and a tape with high numbered 400GB tape cartridges. What would be the best solution to backup this server with the least effort ? I think after one full backup, I can make many increments on one 400GB tape. But how can I make the full backup across the tapes (with manual tape change), and how can I restore one file from the full backup and the increments ?
Is there any easy way to do that like disk based tar backup ?
Is there a way to build a Windows server what can be target for other Windows file servers with rsync ?
tar can create the archive in different formats. GNU tar, ustar, pax, v7. What would be the best for long time archiving? Is there significant differencies in these formats?
I would use the best format for general backups, and I don't want that maybe I can extract the data, because format problems. (v7 is disappear from implementation for example)
I setup an OpenVPN tunnel between two hosts with 50Mbit/s connection. If I test the speed of the endpoints, it's give the 50Mbit speed exactly. But when I do the same over OpenVPN connection, it's limited to 20MBit/s.
Meanwhile the VPN servers (both are rackable servers with high performance) has no significant performance issue. Under 10% CPU usage always.
What would be that setting on OpenVPN what can cause that ?
Is there anyone who has more experience with ZFS under Linux based systems ? I saw ZFS fuse library, but I don't know it;s worth a test or not. Stable, usable ? Maybe as a storage ? Or only experimental projects ?
What would be the best Linux based solution for backup (later maybe tape backup too). There are Bacula, Amanda, and others. Any suggestions which to learn ?
(Now I use compressed tarballs simply)