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What Is a zRAM in LInux ?

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Question ajoutée par Syed AbduL Ahmed Nadeem Siddiqui Ahmed , IT Adminstartor , Working as Freelancer.
Date de publication: 2014/01/30
Dariusz Duma
par Dariusz Duma , System Engineer , Cisco

It's a kernel module, which provide 'swap space in RAM'. In simply words - zram creates in memory block device as a swap device. So there's no need of physical swapfile or swap partition. More, all data are compressed and reading/writing to memory is faster than on hdd/sdd, so1GB of zram is more efficient than1GB of swap partition. The only drawback is that less used pages can't be droped on physical device (and seats in memory until invalidated).

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