...
occurs. Then
although the database at the beginning of the dump has values
(1.2.3,
A),
and
the database at the end of the dump
has values
(5.7.6,4).
the copy of the
database in the
archie ... from the archive.
(a) Find the
most recent full dump and reconstruct the database from
it
(i.e., copy the archise into the database) .
(b) If there are l...
... happens if there is a failure after line (14); perhaps the
computer fails or the network connecting the database to the processor that
is actually performing the transfer fails. Then the database ... seat and books it. The other customer's in-
vocation then begins and sees that the seat is already occupied. It may matter
to the customers
who gets the seat, bu...
...
as
possible, yet they must, between them, cover all the data regions of
the original leaf. Having split the leaf, we replace the region and pointer for the
original leaf at the node above by ...
the record.
If there is no reason to organize the file
any
other way, we can even use
the record number as the search key for a primary index,
as
discussed in Sec-
tion
1...
...
tions, and all the changes to the database system that these actions perform
will remain in the database.
Example
19.24
:
The paths in the graph of Fig. 19.18 that lead to the
Abort
node ... to the transactions at the nodes of the saga. Their job is
to roll back the effect of a committed action in a way that does not depend
on what has happened to the databa...
... the block move under the disk head as the entire
disk assembly rotates.
The time taken between the moment at which the command to read a block
is issued and the time that the contents of the ... latency: the time for the disk to rotate so the first of the sectors
containing the block reaches the head.
X
typical disk rotates completely
about once every 10 mi...
... room for the inserted record in
the
block at hand, then we
simply slide the records within the block and adjust the pointers in the offset
table. The new record is inserted into the block, ... having to retrieve the
block containing the record. The fact that
K
exists in the dense index is enough
to guarantee the existence of the record
with key
I(.
On th...