Chunk server: implement pending chunk reservation accounting to take into the account lazy space reservation that is performed only on the first write. This is especially important with write append as write append delays writes until it buffers enough data, or runs low on buffers, and small host files systems with only few GB of available space.
Chunk server: implement pending chunk reservation accounting to take into the account lazy space reservation that is performed only on the first write. This is especially important with write append as write append delays writes until it buffers enough data, or runs low on buffers, and small host files systems with only few GB of available space.

fengshao0907/qfs,thebigbrain/qfs,chanwit/qfs,chanwit/qfs,chanwit/qfs,fengshao0907/qfs,fengshao0907/qfs,chanwit/qfs,quantcast/qfs,qnu/qfs,chanwit/qfs,qnu/qfs,qnu/qfs,fengshao0907/qfs,thebigbrain/qfs,qnu/qfs,fengshao0907/qfs,qnu/qfs,quantcast/qfs,qnu/qfs,quantcast/qfs,qnu/qfs,chanwit/qfs,quantcast/qfs,quantcast/qfs,thebigbrain/qfs,thebigbrain/qfs,fengshao0907/qfs,fengshao0907/qfs,thebigbrain/qfs,fengshao0907/qfs,thebigbrain/qfs,quantcast/qfs,thebigbrain/qfs,quantcast/qfs,chanwit/qfs,quantcast/qfs,chanwit/qfs,qnu/qfs,thebigbrain/qfs