P2P backup systems have become a novelty solution to ensure data availability. The key idea of P2P backup systems is to use the free memory space shared by peers to store data.

P2P备份系统已经成为确保数据可用的解决方案之一，它的关键思想是利用P2P网络节点的空闲存储空间来存储数据。

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If it does not free enough heap space, it proceeds to collect higher generations until enough memory has been reclaimed.

如果它不能释放足够的堆空间，那么它就继续收集上一代，直到回收了足够的内存。

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When free physical memory starts getting low, programs that have not used recently are moved from ram to paging space to help release physical memory for more real work.

当空闲的物理内存较少时，可以将最近没有使用过的程序从RAM转移到分页空间，以帮助释放物理内存，从而完成更多的实际工作。

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Despite having a 32GB memory card for the Vita with 9GB of free space left, the Vita told him (as seen above) that the device caps displayable content at 100 items.

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