akiradeveloper

 case class Hoge(n: Int) {
    def run: Route = {
      complete(StatusCodes.OK)
    }
  }

  def hoge: Route = {
    pass {
      Hoge(1).run
      // complete(StatusCodes.OK)

akiradeveloper

pwrite(4, "XAGI\0\0\0\1\0\0\0\4\0\4\200\0\0\0\0\0\0\0\0\3\0\0\0\1\0\0\0\0"..., 512, 4831839232) = 512
pwrite(4, "XFSB\0\0\20\0\0\0\0\0\0H\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 512, 4831838208) = 512
pwrite(4, "IABT\0\0\0\0\377\377\377\377\377\377\377\377\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 4096, 3623890944) = 4096
pwrite(4, "XAGI\0\0\0\1\0\0\0\3\0\4\200\0\0\0\0\0\0\0\0\3\0\0\0\1\0\0\0\0"..., 512, 3623879680) = 512
pwrite(4, "XFSB\0\0\20\0\0\0\0\0\0H\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 512, 3623878656) = 512
pwrite(4, "IABT\0\0\0\0\377\377\377\377\377\377\377\377\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 4096, 2415931392) = 4096
pwrite(4, "XAGI\0\0\0\1\0\0\0\2\0\4\200\0\0\0\0\0\0\0\0\3\0\0\0\1\0\0\0\0"..., 512, 2415920128) = 512
pwrite(4, "XFSB\0\0\20\0\0\0\0\0\0H\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 512, 2415919104) = 512
pwrite(4, "IABT\0\0\0\0\377\377\377\377\377\377\377\377\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 4096, 1207971840) = 4096
pwrite(4, "XAGI\0\0\0\1\0\0\0\1\0\4\200\0\0\0\0\0\0\0\0\3\0\0\0\

akiradeveloper

diff --git a/drivers/md/dm-writeboost-daemon.c b/drivers/md/dm-writeboost-daemon.c
index 0136baa..f1e4574 100644
--- a/drivers/md/dm-writeboost-daemon.c
+++ b/drivers/md/dm-writeboost-daemon.c
@@ -255,24 +255,25 @@ static void add_migrate_io(struct wb_device *wb, struct migrate_io *mio)
 	rb_insert_color(&mio->rb_node, &wb->migrate_tree);
 }
 
-static void prepare_migrate_ios(struct wb_device *wb, struct segment_header *seg,
-				size_t k, size_t *migrate_io_count)

akiradeveloper

dm-writeboost
=============
dm-writeboostターゲットはブロックレベルのログ構造化キャッシングを提供する.
dm-writeboostは, 受け取ったランダムライトを巨大なログにまとめ, キャッシュデバイスへのシーケンシャルライトを行う.


Mechanism
=========

Basic Mechanism

akiradeveloper

dm-writeboost
=============
dm-writeboostターゲットはブロックレベルのログ構造化キャッシングを提供する.
dm-writeboostは, 受け取ったランダムライトを巨大なログにまとめ, キャッシュデバイスへのシーケンシャルライトを行う.


Mechanism
=========

Basic Mechanism

akiradeveloper

Writeboost
==========
Writeboost target provides block-level log-structured caching.
Accepted bios are put into a big "log" and the log is written to the cache
device sequentially.


Mechanism
=========
Writeboost caches only writes - reads are not cached.

akiradeveloper

kira@Kamille:~/src/device-mapper-test-suite/lib/dmtest$ git di
diff --git a/lib/dmtest/tests/writeboost/stack.rb b/lib/dmtest/tests/writeboost/stack.rb
index 56b0d73..1aee66d 100644
--- a/lib/dmtest/tests/writeboost/stack.rb
+++ b/lib/dmtest/tests/writeboost/stack.rb
@@ -78,6 +78,12 @@ class WriteboostStack
               @fast_tvm.table('plog_dev')
              ) do |backing_dev, cache_dev, plog_dev|
       @backing_dev = backing_dev
+      class << @backing_dev

akiradeveloper

Successfully installed device_mapper_test_suite-0.0.1
1 gem installed
writeboost
  WriteboostTestsBackingDevice
    compile_ruby
    do_stress
    fio_cache
    fio_database_funtime
    fio_sub_volume
    git_extract_cache_quick

akiradeveloper

        let v1 = vec!["b", "C", "l"];
        let v2 = v1.iter().map(|x| matches.opt_str(*x));
        let n =  v2.filter(|ref x| x.is_none()).count();
        if n > 1 {
                crash!(1, "{}: cannot split in more than one way", NAME);
        } else if n == 1 {
                let e = v2.find(|ref x| !x.is_none()).unwrap(); // error
        }

akiradeveloper

trait Construct {
    fn new(_hint: Option<Self>) -> Box<Construct>;
}

struct Foo { x: int }
struct Bar { y: uint }

impl Construct for Foo {
    fn new(_: Option<Foo>) -> Box<Construct> {
        box Foo { x: 42 } as Box<Construct>