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A: Tahoe-LAFS is designed to allow multiple users to access the same files. You wouldn't like it if one day a file of yours had been deleted by somebody else, right? Therefore, we have to solve The Garbage Collection Problem. The current solution is: do lease-renewal every month or so, and delete any files that nobody has lease-renewed in more than a month or so.
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For more details read [Garbage Collection in Tahoe](https://tahoe-lafs.org/trac/tahoe-lafs/browser/trunk/docs/garbage-collection.rst).
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**<a name="Q29_bandwidth_performance">Q29:</a> What is actual operational read/write speed of Tahoe-LAFS grid?**
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A: It depends on multiple factors starting from your hardware and ending with TPC/IP stack parameters. And much-much more!
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Practically the following results have been reported: **16Mbps in throughput for writing and about 8.8Mbps in reading** (based on Grid of 24 storage nodes on 24 VM's running under [OpenStack](OpenStack) in 4 data centres; each VM had two 2 VCPU's, 4GB of RAM, and 50GB of disk space).
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You can read the following section for more details: [Performance](https://tahoe-lafs.org/trac/tahoe-lafs/wiki/Performance).
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