История изменений

l2arc это обычный кэш, без всяких хитрых таблиц в памяти.

arc таки держит таблицу соответствия l2arc, правда я хз откуда далдон взял 1 к 5.

It costs some DRAM to reference the L2ARC, at a rate proportional to record size. For example, it currently takes about 15 Gbytes of DRAM to reference 600 Gbytes of L2ARC - at an 8 Kbyte ZFS record size. If you use a 16 Kbyte record size, that cost would be halve - 7.5 Gbytes. This means you shouldn't, for example, configure a system with only 8 Gbytes of DRAM, 600 Gbytes of L2ARC, and an 8 Kbyte record size - if you did, the L2ARC would never fully populate.

l2arc это обычный кэш, без всяких хитрых таблиц в памяти.

arc таки держит таблицу соответствия l2arc, правда я хз откуда далдон взал 1 к 5.

It costs some DRAM to reference the L2ARC, at a rate proportional to record size. For example, it currently takes about 15 Gbytes of DRAM to reference 600 Gbytes of L2ARC - at an 8 Kbyte ZFS record size. If you use a 16 Kbyte record size, that cost would be halve - 7.5 Gbytes. This means you shouldn't, for example, configure a system with only 8 Gbytes of DRAM, 600 Gbytes of L2ARC, and an 8 Kbyte record size - if you did, the L2ARC would never fully populate.