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Implement immediate commit mode

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This commit is contained in:
Vitaliy Filippov
2020-03-10 01:59:15 +03:00
parent c3737ae3ff
commit 3f522c66e6
8 changed files with 211 additions and 74 deletions
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blockstore_open.cpp
+24 -2
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@@ -34,6 +34,14 @@ void blockstore_impl_t::parse_config(blockstore_config_t & config)
{
disable_journal_fsync = true;
}
if (config["immediate_commit"] == "all")
{
immediate_commit = IMMEDIATE_ALL;
}
else if (config["immediate_commit"] == "small")
{
immediate_commit = IMMEDIATE_SMALL;
}
metadata_buf_size = strtoull(config["meta_buf_size"].c_str(), NULL, 10);
cfg_journal_size = strtoull(config["journal_size"].c_str(), NULL, 10);
data_device = config["data_device"];
@@ -129,6 +137,22 @@ void blockstore_impl_t::parse_config(blockstore_config_t & config)
{
metadata_buf_size = 4*1024*1024;
}
if (meta_device == "")
{
disable_meta_fsync = disable_data_fsync;
}
if (journal_device == "")
{
disable_journal_fsync = disable_meta_fsync;
}
if (immediate_commit != IMMEDIATE_NONE && !disable_journal_fsync)
{
throw std::runtime_error("immediate_commit requires disable_journal_fsync");
}
if (immediate_commit == IMMEDIATE_ALL && !disable_data_fsync)
{
throw std::runtime_error("immediate_commit=all requires disable_journal_fsync and disable_data_fsync");
}
// init some fields
clean_entry_bitmap_size = block_size / bitmap_granularity / 8;
clean_entry_size = sizeof(clean_disk_entry) + clean_entry_bitmap_size;
@@ -283,7 +307,6 @@ void blockstore_impl_t::open_meta()
else
{
meta_fd = data_fd;
disable_meta_fsync = disable_data_fsync;
meta_size = 0;
if (meta_offset >= data_size)
{
@@ -306,7 +329,6 @@ void blockstore_impl_t::open_journal()
else
{
journal.fd = meta_fd;
disable_journal_fsync = disable_meta_fsync;
journal.device_size = 0;
if (journal.offset >= data_size)
{