Cache Data Structures

class Vol

A badly named class that represents a stripe.

class OpenDirEntry

Represents an active cache object.

class CacheHttpInfoVector::Slice

A version of an alternate.

class CacheVC

A cache operation object that intermediates between the HTTP transaction and an object in cache. Each instance is associated with a specific cached object and a specific transaction.

Diagrams

digraph data {
rankdir=LR
node [shape=plaintext]

CacheVC [ label=< <TABLE BORDER="0" CELLBORDER="1" CELLSPACING="0">
   <TR><TD BGCOLOR="palegreen" port="name">\N</TD></TR>
   </TABLE> >
]

OpenDirEntry [ label=< <TABLE BORDER="0" CELLBORDER="1" CELLSPACING="0">
   <TR><TD BGCOLOR="palegreen" port="name">\N</TD></TR>
   </TABLE> >
]

HttpCacheAlt [ label=< <TABLE BORDER="0" CELLBORDER="1" CELLSPACING="0">
   <TR><TD BGCOLOR="palegreen" port="name">\N</TD></TR>
   <TR><TD port="m_earliest">m_earliest</TD></TR>
   <TR><TD>m_cached_idx</TD></TR>
   </TABLE> >
]

FragmentDescriptor [ label=< <TABLE BORDER="0" CELLBORDER="1" CELLSPACING="0">
   <TR><TD BGCOLOR="palegreen" port="name">\N</TD></TR>
   <TR><TD ALIGN="LEFT">m_key</TD></TR>
   <TR><TD ALIGN="LEFT">m_offset</TD></TR>
   <TR><TD ALIGN="LEFT">&#8868;m_flags</TD></TR>
   <TR><TD ALIGN="LEFT"> &#8866;.cached_p</TD></TR>
   </TABLE> >
]

Slice [ label=< <TABLE BORDER="0" CELLBORDER="1" CELLSPACING="0">
   <TR><TD BGCOLOR="palegreen" port="name">\N</TD></TR>
   <TR><TD ALIGN="LEFT" port="writers">_writers</TD></TR>
   <TR><TD ALIGN="LEFT" port="active">_active</TD></TR>
   <TR><TD ALIGN="LEFT" port="waiting">_waiting</TD></TR>
   <TR><TD ALIGN="LEFT">_content_buffers</TD></TR>
   <TR><TD ALIGN="LEFT">_wait_idx_min</TD></TR>
   <TR><TD ALIGN="LEFT">_wait_idx_max</TD></TR>
   <TR><TD ALIGN="LEFT">_gen</TD></TR>
   <TR><TD ALIGN="LEFT">&#8868;_flags</TD></TR>
   <TR><TD ALIGN="LEFT"> &#8866;.dirty</TD></TR>
   </TABLE> >
]

HttpCacheAlt:m_earliest -> FragmentDescriptor:name [dir=back,arrowtail=diamond]

Slice:writers -> CacheVC:name [dir=back,arrowtail=odiamond,label="1:*"]
Slice:active -> CacheVC:name [dir=back,arrowtail=odiamond,label="1:*"]
Slice:waiting -> CacheVC:name [dir=back,arrowtail=odiamond,label="1:*"]
}