Such compression is important given that YouTube users upload some 20 hours of footage per minute; by shrinking the files, YouTube needs to buy less bandwidth from Internet access providers.
SecondSite also found that compressionof dirty pages could yield as much as an 80% improvement in bandwidth for a single VM replication.
SecondSite还发现，压缩脏页面能够将单次VM复制的带宽提高80%。
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Compression - Method of reducing the bandwidth or bits needed to encode information. Typically used in cable to place more channels in the bandwidth originally occupied by one channel.