0cfb990d58
- switched from mmap based writing to simpler stdio based writing. Has a minor impact (0.5 microseconds) on microbenchmarks for asynchronous writes. Synchronous writes speed up from 30ms to 10ms on linux/ext4. Should be much more reliable on diverse platforms. - compaction errors now immediately put the database into a read-only mode (until it is re-opened). As a downside, a disk going out of space and then space being created will require a re-open to recover from, whereas previously that would happen automatically. On the plus side, many corruption possibilities go away. - force the DB to enter an error-state so that all future writes fail when a synchronous log write succeeds but the sync fails. - repair now regenerates sstables that exhibit problems - fix issue 218 - Use native memory barriers on OSX - fix issue 212 - QNX build is broken - fix build on iOS with xcode 5 - make tests compile and pass on windows
54 lines
1.7 KiB
C++
54 lines
1.7 KiB
C++
// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file. See the AUTHORS file for names of contributors.
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#ifndef STORAGE_LEVELDB_UTIL_TESTUTIL_H_
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#define STORAGE_LEVELDB_UTIL_TESTUTIL_H_
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#include "leveldb/env.h"
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#include "leveldb/slice.h"
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#include "util/random.h"
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namespace leveldb {
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namespace test {
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// Store in *dst a random string of length "len" and return a Slice that
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// references the generated data.
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extern Slice RandomString(Random* rnd, int len, std::string* dst);
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// Return a random key with the specified length that may contain interesting
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// characters (e.g. \x00, \xff, etc.).
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extern std::string RandomKey(Random* rnd, int len);
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// Store in *dst a string of length "len" that will compress to
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// "N*compressed_fraction" bytes and return a Slice that references
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// the generated data.
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extern Slice CompressibleString(Random* rnd, double compressed_fraction,
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size_t len, std::string* dst);
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// A wrapper that allows injection of errors.
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class ErrorEnv : public EnvWrapper {
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public:
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bool writable_file_error_;
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int num_writable_file_errors_;
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ErrorEnv() : EnvWrapper(Env::Default()),
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writable_file_error_(false),
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num_writable_file_errors_(0) { }
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virtual Status NewWritableFile(const std::string& fname,
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WritableFile** result) {
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if (writable_file_error_) {
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++num_writable_file_errors_;
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*result = NULL;
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return Status::IOError(fname, "fake error");
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}
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return target()->NewWritableFile(fname, result);
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}
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};
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} // namespace test
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} // namespace leveldb
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#endif // STORAGE_LEVELDB_UTIL_TESTUTIL_H_
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