mirror of https://github.com/dswd/zvault
78 lines
2.9 KiB
Rust
78 lines
2.9 KiB
Rust
use ::prelude::*;
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use std::collections::HashSet;
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impl Repository {
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fn delete_bundle(&mut self, id: u32) -> Result<(), RepositoryError> {
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if let Some(bundle) = self.bundle_map.remove(id) {
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try!(self.bundles.delete_bundle(&bundle));
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Ok(())
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} else {
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Err(IntegrityError::MissingBundleId(id).into())
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}
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}
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pub fn vacuum(&mut self, ratio: f32, force: bool) -> Result<(), RepositoryError> {
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try!(self.flush());
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info!("Locking repository");
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try!(self.write_mode());
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let _lock = try!(self.lock(true));
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if self.dirty {
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return Err(RepositoryError::Dirty)
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}
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self.dirty = true;
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info!("Analyzing chunk usage");
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let usage = try!(self.analyze_usage());
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let mut data_total = 0;
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let mut data_used = 0;
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for bundle in usage.values() {
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data_total += bundle.info.encoded_size;
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data_used += bundle.get_used_size();
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}
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info!("Usage: {} of {}, {:.1}%", to_file_size(data_used as u64), to_file_size(data_total as u64), data_used as f32/data_total as f32*100.0);
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let mut rewrite_bundles = HashSet::new();
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let mut reclaim_space = 0;
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for (id, bundle) in &usage {
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if bundle.get_usage_ratio() <= ratio {
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rewrite_bundles.insert(*id);
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reclaim_space += bundle.get_unused_size();
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}
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}
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info!("Reclaiming {} by rewriting {} bundles", to_file_size(reclaim_space as u64), rewrite_bundles.len());
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if !force {
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self.dirty = false;
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return Ok(())
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}
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for id in ProgressIter::new("rewriting bundles", rewrite_bundles.len(), rewrite_bundles.iter()) {
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let bundle = &usage[id];
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let bundle_id = self.bundle_map.get(*id).unwrap();
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let chunks = try!(self.bundles.get_chunk_list(&bundle_id));
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let mode = usage[id].info.mode;
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for (chunk, &(hash, _len)) in chunks.into_iter().enumerate() {
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if !bundle.chunk_usage.get(chunk) {
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try!(self.index.delete(&hash));
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continue
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}
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let data = try!(self.bundles.get_chunk(&bundle_id, chunk));
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try!(self.put_chunk_override(mode, hash, &data));
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}
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}
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try!(self.flush());
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info!("Checking index");
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self.index.walk::<_, ()>(|hash, location| {
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if rewrite_bundles.contains(&location.bundle) {
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panic!("Removed bundle is still referenced in index: hash:{}, bundle:{}, chunk:{}", hash, location.bundle, location.chunk);
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}
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Ok(())
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}).ok();
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info!("Deleting {} bundles", rewrite_bundles.len());
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for id in rewrite_bundles {
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try!(self.delete_bundle(id));
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}
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try!(self.save_bundle_map());
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self.dirty = false;
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Ok(())
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}
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}
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