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Comment Re:Hmm. (Score 1) 55

One thing I'm not seeing in the comments yet: don't forget that most NoSQL solutions are written for commodity hardware, which also makes them very suitable for cloud solutions. To get the same kind of performance out of a relational DB, you need expensive hardware.

Cassandra can also be made aware of the rack or data center the nodes are running in, so it can lay out its data replica's for regional data safety (think EC2 data center failures, all too common) but still offer optimal local data access.

Comment Re:Know the right people (Score 1) 274

Here in Belgium the rule of thumb is 30 years before you need major renovations, typically including a new roof, kitchen, heating, windows, ... Some parts may last a little longer with proper maintenance, but like you say technology gets outdated too.

We bought a 40 years old house and basically stripped it down to the walls. The electric installation was minimal, in the bedrooms there was just one socket each. Otherwise it was outright dangerous.

Comment Re:Depends on 'headroom' of other subsystems. (Score 1) 370

Or just the classical scaling issues when adding more cores and more threads, such that the threads are waiting for each other on locks. It's usually worse because multi core processors are typically clocked slower. So you have more threads but they execute slower each, causing the lock to be held longer by each thread, causing more lock contention...

Comment Re:I didn't really get this at first. (Score 1) 348

Over here almost everybody has a laptop. The recommendation is to take it home every day, the alternative is to put it in your locker. Don't leave it on your desk because security will confiscate it because it might be stolen otherwise. Everybody knows how safe Kensington locks are (not at all). If you really need overnight jobs to run you can still get a fixed desktop pc next to your laptop. Guess how many computers don't get turned off at night? On top of that it's more efficient in every single way. Laptops use less energy, you can carry them with you in meetings (wifi rules), we can work from home over vpn when it suits you and so on. They're not that much more expensive compared to desktops either.

Comment Re:Translation: (Score 2, Informative) 196

Way easier to manage: only 2 commands! While now with an LVM you have to place your disks in the desired topology inside your LVM (RAID0, 1, 5, ...), format them, put a filesystem on, mount, file check, repair, whatever. With zfs you place disks in your pool and kinda mount part of it, that's it.

There are some other things you could complain about: it makes less sense on hardware RAIDs with good management tools. They missed a chance to make it a distributed or clusterable file system (though they bought Lustre lately, who knows) and it's not possible to boot from it yet, but all in all it's a major step forward.

Truly simple systems... require infinite testing. -- Norman Augustine