Actually, Google Mail has had a spam problem for a while now. Theiroldest problem is advance fee fraud spammers; GMail has been playinghost to a revolving cast of them starting roughly from when it firstbecame reasonably easy to obtain a GMail account. Given that 419 spamis hard to detect automatically this isn't too surprising, but still .

Recently it's gotten worse, possibly because automation may have becomemuch better at creating GMail accounts. I'm seeing recognizable repeatspammers, with more

Suppose that you have a a number of groups (or people), each of whichis purchased a certain amount of disk space, and that you have put allof the groups in the same overall ZFS pool. ZFS gives you two ways tolimit each group's disk usage to the amount of space that they'reentitled to: reservations or quotas. Which one is better?

It turns out that the answer is simple: use quotas.

(In both cases you give each group a top level container