Mercurial > lbo > hg > sstable
view src/options.rs @ 38:5f4219f141ba
types: Remove FileMetaData
author | Lewin Bormann <lbo@spheniscida.de> |
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date | Mon, 18 Sep 2017 19:16:24 +0200 |
parents | 04468480cdcf |
children | d2559e2729e4 |
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use cmp::{Cmp, DefaultCmp}; use types::SequenceNumber; use std::default::Default; use std::sync::Arc; const KB: usize = 1 << 10; const MB: usize = KB * KB; const BLOCK_MAX_SIZE: usize = 4 * KB; const WRITE_BUFFER_SIZE: usize = 4 * MB; #[derive(Clone, Copy, PartialEq, Debug)] pub enum CompressionType { CompressionNone = 0, CompressionSnappy = 1, } pub fn int_to_compressiontype(i: u32) -> Option<CompressionType> { match i { 0 => Some(CompressionType::CompressionNone), 1 => Some(CompressionType::CompressionSnappy), _ => None, } } /// [not all member types implemented yet] /// #[derive(Clone)] pub struct Options { pub cmp: Arc<Box<Cmp>>, pub create_if_missing: bool, pub error_if_exists: bool, pub paranoid_checks: bool, // pub logger: Logger, pub write_buffer_size: usize, pub max_open_files: usize, pub block_size: usize, pub block_restart_interval: usize, pub compression_type: CompressionType, pub reuse_logs: bool, } impl Default for Options { fn default() -> Options { Options { cmp: Arc::new(Box::new(DefaultCmp)), create_if_missing: true, error_if_exists: false, paranoid_checks: false, write_buffer_size: WRITE_BUFFER_SIZE, max_open_files: 1 << 10, block_size: BLOCK_MAX_SIZE, block_restart_interval: 16, reuse_logs: false, compression_type: CompressionType::CompressionNone, } } } /// Supplied to DB read operations. pub struct ReadOptions { pub verify_checksums: bool, pub snapshot: Option<SequenceNumber>, } impl Default for ReadOptions { fn default() -> Self { ReadOptions { verify_checksums: false, snapshot: None, } } } /// Supplied to write operations pub struct WriteOptions { pub sync: bool, } impl Default for WriteOptions { fn default() -> Self { WriteOptions { sync: false } } }