class PEROBS::FlatFile
The FlatFile
class manages the storage file of the FlatFileDB
. It contains a sequence of blobs Each blob consists of header and the actual blob data bytes.
Constants
- INDEX_BTREE_ORDER
The number of entries in a single
BTree
node of the index file.
Public Class Methods
# File lib/perobs/FlatFile.rb, line 767 def FlatFile::insert_header_checksums(db_dir) old_file_name = File.join(db_dir, 'database.blobs') new_file_name = File.join(db_dir, 'database_v4.blobs') bak_file_name = File.join(db_dir, 'database_v3.blobs') old_file = File.open(old_file_name, 'rb') new_file = File.open(new_file_name, 'wb') entries = 0 while (buf = old_file.read(21)) flags, length, id, crc = *buf.unpack('CQQL') blob_data = old_file.read(length) # Some basic sanity checking to ensure all reserved bits are 0. Older # versions of PEROBS used to set bit 1 despite it being reserved now. unless flags & 0xF0 == 0 PEROBS.log.fatal "Blob file #{old_file_name} contains illegal " + "flag byte #{'%02x' % flags} at #{old_file.pos - 21}" end # Check if the blob is valid and current. if flags & 0x1 == 1 && flags & 0x8 == 0 # Make sure the bit 1 is not set anymore. flags = flags & 0x05 header_str = [ flags, length, id, crc ].pack('CQQL') header_crc = Zlib.crc32(header_str, 0) header_str += [ header_crc ].pack('L') new_file.write(header_str + blob_data) entries += 1 end end PEROBS.log.info "Header checksum added to #{entries} entries" old_file.close new_file.close File.rename(old_file_name, bak_file_name) File.rename(new_file_name, old_file_name) end
Create a new FlatFile
object for a database in the given path. @param dir [String] Directory path for the data base file
# File lib/perobs/FlatFile.rb, line 49 def initialize(dir, progressmeter) @db_dir = dir @progressmeter = progressmeter @f = nil @marks = nil @index = BTree.new(@db_dir, 'index', INDEX_BTREE_ORDER, @progressmeter) old_spaces_file = File.join(@db_dir, 'database_spaces.blobs') if File.exist?(old_spaces_file) # PEROBS version 4.1.0 and earlier used this space list format. It is # deprecated now. Newly created DBs use the SpaceManager format. @space_list = SpaceTree.new(@db_dir, @progressmeter) else @space_list = SpaceManager.new(@db_dir, @progressmeter) end end
Public Instance Methods
Check the FlatFile
. @return [Integer] Number of errors found
# File lib/perobs/FlatFile.rb, line 459 def check() errors = 0 return errors unless @f t = Time.now PEROBS.log.info "Checking FlatFile database..." # First check the database blob file. Each entry should be readable and # correct and all IDs must be unique. We use a shadow index to keep # track of the already found IDs. new_index = BTree.new(@db_dir, 'new-index', INDEX_BTREE_ORDER, @progressmeter) new_index.erase new_index.open corrupted_blobs = 0 end_of_last_healthy_blob = nil @progressmeter.start('Checking blobs file', @f.size) do |pm| corrupted_blobs = each_blob_header do |header| if header.is_valid? # We have a non-deleted entry. begin @f.seek(header.addr + FlatFileBlobHeader::LENGTH) buf = @f.read(header.length) if buf.bytesize != header.length PEROBS.log.error "Premature end of file in blob with ID " + "#{header.id}." errors += 1 next end # Uncompress the data if the compression bit is set in the mark # byte. if header.is_compressed? begin buf = Zlib.inflate(buf) rescue Zlib::BufError, Zlib::DataError PEROBS.log.error "Corrupted compressed block with ID " + "#{header.id} found." errors += 1 next end end if header.crc && checksum(buf) != header.crc PEROBS.log.error "Checksum failure while checking blob " + "with ID #{header.id}" errors += 1 next end rescue IOError => e PEROBS.log.fatal "Check of blob with ID #{header.id} failed: " + e.message end # Check if the ID has already been found in the file. if (previous_address = new_index.get(header.id)) PEROBS.log.error "Multiple blobs for ID #{header.id} found. " + "Addresses: #{previous_address}, #{header.addr}" errors += 1 previous_header = FlatFileBlobHeader.read(@f, previous_address, header.id) else # ID is unique so far. Add it to the shadow index. new_index.insert(header.id, header.addr) end end end_of_last_healthy_blob = header.addr + FlatFileBlobHeader::LENGTH + header.length pm.update(header.addr) end if end_of_last_healthy_blob && end_of_last_healthy_blob != @f.size # The blob file ends with a corrupted blob header. PEROBS.log.error "#{@f.size - end_of_last_healthy_blob} corrupted " + 'bytes found at the end of FlatFile.' corrupted_blobs += 1 end errors += corrupted_blobs end # We no longer need the new index. new_index.close new_index.erase if corrupted_blobs == 0 # Now we check the index data. It must be correct and the entries must # match the blob file. All entries in the index must be in the blob file # and vise versa. begin index_ok = @index.check do |id, address| unless has_id_at?(id, address) PEROBS.log.error "Index contains an entry for " + "ID #{id} at address #{address} that is not in FlatFile" false else true end end x_check_errs = 0 space_check_ok = true unless index_ok && (space_check_ok = @space_list.check(self)) && (x_check_errs = cross_check_entries) == 0 errors += 1 unless index_ok && space_check_ok errors += x_check_errs end rescue PEROBS::FatalError errors += 1 end end PEROBS.log.info "FlatFile check completed in #{Time.now - t} seconds. " + "#{errors} errors found." errors end
Clear alls marks.
# File lib/perobs/FlatFile.rb, line 340 def clear_all_marks if @marks @marks.clear else @marks = IDList.new(@db_dir, 'marks', item_counter) end end
Close the flat file. This method must be called to ensure that all data is really written into the filesystem.
# File lib/perobs/FlatFile.rb, line 92 def close @space_list.close if @space_list.is_open? @index.close if @index.is_open? if @marks @marks.erase @marks = nil end if @f @f.flush @f.flock(File::LOCK_UN) @f.fsync @f.close @f = nil end end
Eliminate all the holes in the file. This is an in-place implementation. No additional space will be needed on the file system.
# File lib/perobs/FlatFile.rb, line 350 def defragmentize distance = 0 new_file_size = 0 deleted_blobs = 0 corrupted_blobs = 0 valid_blobs = 0 # Iterate over all entries. @progressmeter.start('Defragmentizing blobs file', @f.size) do |pm| each_blob_header do |header| # If we have stumbled over a corrupted blob we treat it similar to a # deleted blob and reuse the space. if header.corruption_start distance += header.addr - header.corruption_start corrupted_blobs += 1 end # Total size of the current entry entry_bytes = FlatFileBlobHeader::LENGTH + header.length if header.is_valid? # We have found a valid entry. valid_blobs += 1 if distance > 0 begin # Read current entry into a buffer @f.seek(header.addr) buf = @f.read(entry_bytes) # Write the buffer right after the end of the previous entry. @f.seek(header.addr - distance) @f.write(buf) # Mark the space between the relocated current entry and the # next valid entry as deleted space. FlatFileBlobHeader.new(@f, @f.pos, 0, distance - FlatFileBlobHeader::LENGTH, 0, 0).write @f.flush rescue IOError => e PEROBS.log.fatal "Error while moving blob for ID " + "#{header.id}: #{e.message}" end end new_file_size = header.addr - distance + FlatFileBlobHeader::LENGTH + header.length else deleted_blobs += 1 distance += entry_bytes end pm.update(header.addr) end end PEROBS.log.info "#{distance / 1000} KiB/#{deleted_blobs} blobs of " + "#{@f.size / 1000} KiB/#{valid_blobs} blobs or " + "#{'%.1f' % (distance.to_f / @f.size * 100.0)}% reclaimed" if corrupted_blobs > 0 PEROBS.log.info "#{corrupted_blobs} corrupted blob(s) found. Space " + "was recycled." end @f.flush @f.truncate(new_file_size) @f.flush sync end
Delete the blob that is stored at the specified address. @param addr [Integer] Address of the blob to delete @param id [Integer] ID of the blob to delete
# File lib/perobs/FlatFile.rb, line 137 def delete_obj_by_address(addr, id) @index.remove(id) if @index.is_open? header = FlatFileBlobHeader.read(@f, addr, id) header.clear_flags @space_list.add_space(addr, header.length) if @space_list.is_open? end
Delete the blob for the specified ID. @param id [Integer] ID of the object to be deleted @return [Boolean] True if object was deleted, false otherwise
# File lib/perobs/FlatFile.rb, line 125 def delete_obj_by_id(id) if (pos = find_obj_addr_by_id(id)) delete_obj_by_address(pos, id) return true end return false end
Delete all unmarked objects.
# File lib/perobs/FlatFile.rb, line 145 def delete_unmarked_objects(&block) # We don't update the index and the space list during this operation as # we defragmentize the blob file at the end. We'll end the operation # with an empty space list. clear_index_files deleted_objects_count = 0 @progressmeter.start('Sweeping unmarked objects', @f.size) do |pm| each_blob_header do |header| if header.is_valid? && !@marks.include?(header.id) delete_obj_by_address(header.addr, header.id) yield(header.id) if block_given? deleted_objects_count += 1 end pm.update(header.addr) end end defragmentize # Update the index file and create a new, empty space list. regenerate_index_and_spaces deleted_objects_count end
Find the address of the object with the given ID. @param id [Integer] ID of the object @return [Integer] Offset in the flat file or nil if not found
# File lib/perobs/FlatFile.rb, line 268 def find_obj_addr_by_id(id) @index.get(id) end
# File lib/perobs/FlatFile.rb, line 744 def has_id_at?(id, address) begin header = FlatFileBlobHeader.read(@f, address) rescue PEROBS::FatalError return false end header.is_valid? && header.id == id end
# File lib/perobs/FlatFile.rb, line 739 def has_space?(address, size) header = FlatFileBlobHeader.read(@f, address) !header.is_valid? && header.length == size end
# File lib/perobs/FlatFile.rb, line 753 def inspect s = '[' each_blob_header do |header| s << "{ :pos => #{header.addr}, :flags => #{header.flags}, " + ":length => #{header.length}, :id => #{header.id}, " + ":crc => #{header.crc}" if header.is_valid? s << ", :value => #{@f.read(header.length)}" end s << " }\n" end s + ']' end
Return true if the object with the given ID is marked, false otherwise. @param id [Integer] ID of the object
# File lib/perobs/FlatFile.rb, line 335 def is_marked_by_id?(id) @marks.include?(id) end
@return [Integer] Number of items stored in the DB.
# File lib/perobs/FlatFile.rb, line 284 def item_counter @index.entries_count end
Mark the object with the given ID. @param id [Integer] ID of the object
# File lib/perobs/FlatFile.rb, line 329 def mark_obj_by_id(id) @marks.insert(id) end
Open the flat file for reading and writing.
# File lib/perobs/FlatFile.rb, line 66 def open file_name = File.join(@db_dir, 'database.blobs') new_db_created = false begin if File.exist?(file_name) @f = File.open(file_name, 'rb+') else PEROBS.log.info "New FlatFile database '#{file_name}' created" @f = File.open(file_name, 'wb+') new_db_created = true end rescue IOError => e PEROBS.log.fatal "Cannot open FlatFile database #{file_name}: " + e.message end unless @f.flock(File::LOCK_NB | File::LOCK_EX) PEROBS.log.fatal "FlatFile database '#{file_name}' is locked by " + "another process" end @f.sync = true open_index_files(!new_db_created) end
Read the object at the specified address. @param addr [Integer] Offset in the flat file @param id [Integer] ID of the data blob @return [String] Raw object data
# File lib/perobs/FlatFile.rb, line 292 def read_obj_by_address(addr, id) header = FlatFileBlobHeader.read(@f, addr, id) if header.id != id PEROBS.log.fatal "Database index corrupted: Index for object " + "#{id} points to object with ID #{header.id} at address #{addr}" end buf = nil begin @f.seek(addr + FlatFileBlobHeader::LENGTH) buf = @f.read(header.length) rescue IOError => e PEROBS.log.fatal "Cannot read blob for ID #{id} at address #{addr}: " + e.message end # Uncompress the data if the compression bit is set in the flags byte. if header.is_compressed? begin buf = Zlib.inflate(buf) rescue Zlib::BufError, Zlib::DataError PEROBS.log.fatal "Corrupted compressed block with ID " + "#{id} found at address #{addr}." end end if checksum(buf) != header.crc PEROBS.log.fatal "Checksum failure while reading blob ID #{id} " + "at address #{addr}" end buf end
Read the object with the given ID. @param id [Integer] ID of the object @return [String or nil] Raw object data if found, otherwise nil
# File lib/perobs/FlatFile.rb, line 275 def read_obj_by_id(id) if (addr = find_obj_addr_by_id(id)) return read_obj_by_address(addr, id) end nil end
This method iterates over all entries in the FlatFile
and removes the entry and inserts it again. This is useful to update all entries in case the storage format has changed.
# File lib/perobs/FlatFile.rb, line 420 def refresh # This iteration might look scary as we iterate over the entries while # while we are rearranging them. Re-inserted items may be inserted # before or at the current entry and this is fine. They also may be # inserted after the current entry and will be re-read again unless they # are inserted after the original file end. file_size = @f.size # We don't update the index and the space list during this operation as # we defragmentize the blob file at the end. We'll end the operation # with an empty space list. clear_index_files @progressmeter.start('Converting objects to new storage format', @f.size) do |pm| each_blob_header do |header| if header.is_valid? buf = read_obj_by_address(header.addr, header.id) delete_obj_by_address(header.addr, header.id) write_obj_by_id(header.id, buf) end # Some re-inserted blobs may be inserted after the original file end. # No need to process those blobs again. break if header.addr >= file_size pm.update(header.addr) end end # Reclaim the space saved by compressing entries. defragmentize # Recreate the index file and create an empty space list. regenerate_index_and_spaces end
This method clears the index tree and the free space list and regenerates them from the FlatFile
.
# File lib/perobs/FlatFile.rb, line 705 def regenerate_index_and_spaces PEROBS.log.warn "Re-generating FlatFileDB index and space files" @index.open unless @index.is_open? @index.clear @space_list.open unless @space_list.is_open? @space_list.clear @progressmeter.start('Re-generating database index', @f.size) do |pm| each_blob_header do |header| if header.is_valid? if (duplicate_pos = @index.get(header.id)) PEROBS.log.error "FlatFile contains multiple blobs for ID " + "#{header.id}. First blob is at address #{duplicate_pos}. " + "Other blob found at address #{header.addr}." if header.length > 0 @space_list.add_space(header.addr, header.length) end discard_damaged_blob(header) else @index.insert(header.id, header.addr) end else if header.length > 0 @space_list.add_space(header.addr, header.length) end end pm.update(header.addr) end end sync end
Repair the FlatFile
. In contrast to the repair functionality in the check() method this method is much faster. It simply re-creates the index and space list from the blob file. @param repair [Boolean] True if errors should be fixed. @return [Integer] Number of errors found
# File lib/perobs/FlatFile.rb, line 583 def repair errors = 0 return errors unless @f t = Time.now PEROBS.log.info "Repairing FlatFile database" # Erase and re-open the index and space list files. We purposely don't # close the files at it would trigger needless flushing. clear_index_files(true) # Now we scan the blob file and re-index all blobs and spaces. Corrupted # blobs will be skipped. corrupted_blobs = 0 end_of_last_healthy_blob = nil @progressmeter.start('Re-indexing blobs file', @f.size) do |pm| corrupted_blobs = each_blob_header do |header| if header.corruption_start # The blob is preceeded by a corrupted area. We create a new # header of a deleted blob for this area and write the new blob # over it. if (data_length = header.addr - header.corruption_start - FlatFileBlobHeader::LENGTH) <= 0 PEROBS.log.error "Found a corrupted blob that is too small to " + "fit a header (#{data_length}). File must be defragmented." else new_header = FlatFileBlobHeader.new(@f, header.corruption_start, 0, data_length, 0, 0) new_header.write @space_list.add_space(header.corruption_start, data_length) end end if header.is_valid? # We have a non-deleted entry. begin @f.seek(header.addr + FlatFileBlobHeader::LENGTH) buf = @f.read(header.length) if buf.bytesize != header.length PEROBS.log.error "Premature end of file in blob with ID " + "#{header.id}." discard_damaged_blob(header) errors += 1 next end # Uncompress the data if the compression bit is set in the mark # byte. if header.is_compressed? begin buf = Zlib.inflate(buf) rescue Zlib::BufError, Zlib::DataError PEROBS.log.error "Corrupted compressed block with ID " + "#{header.id} found." discard_damaged_blob(header) errors += 1 next end end if header.crc && checksum(buf) != header.crc PEROBS.log.error "Checksum failure while checking blob " + "with ID #{header.id}" discard_damaged_blob(header) errors += 1 next end rescue IOError => e PEROBS.log.fatal "Check of blob with ID #{header.id} failed: " + e.message end # Check if the ID has already been found in the file. if (previous_address = @index.get(header.id)) PEROBS.log.error "Multiple blobs for ID #{header.id} found. " + "Addresses: #{previous_address}, #{header.addr}" errors += 1 previous_header = FlatFileBlobHeader.read(@f, previous_address, header.id) # We have two blobs with the same ID and we must discard one of # them. discard_duplicate_blobs(header, previous_header) else # ID is unique so far. Add it to the shadow index. @index.insert(header.id, header.addr) end else if header.length > 0 @space_list.add_space(header.addr, header.length) end end end_of_last_healthy_blob = header.addr + FlatFileBlobHeader::LENGTH + header.length pm.update(header.addr) end if end_of_last_healthy_blob && end_of_last_healthy_blob != @f.size # The blob file ends with a corrupted blob header. PEROBS.log.error "#{@f.size - end_of_last_healthy_blob} corrupted " + 'bytes found at the end of FlatFile.' corrupted_blobs += 1 PEROBS.log.error "Truncating FlatFile to " + "#{end_of_last_healthy_blob} bytes by discarding " + "#{@f.size - end_of_last_healthy_blob} bytes" @f.truncate(end_of_last_healthy_blob) end errors += corrupted_blobs end sync PEROBS.log.info "FlatFile repair completed in #{Time.now - t} seconds. " + "#{errors} errors found." errors end
Force outstanding data to be written to the filesystem.
# File lib/perobs/FlatFile.rb, line 111 def sync begin @f.flush @f.fsync rescue IOError => e PEROBS.log.fatal "Cannot sync flat file database: #{e.message}" end @index.sync @space_list.sync end
Write the given object into the file. This method never uses in-place updates for existing objects. A new copy is inserted first and only when the insert was successful, the old copy is deleted and the index updated. @param id [Integer] ID of the object @param raw_obj [String] Raw object as String @return [Integer] position of the written blob in the blob file
# File lib/perobs/FlatFile.rb, line 178 def write_obj_by_id(id, raw_obj) # Check if we have already an object with the given ID. We'll mark it as # outdated and save the header for later deletion. In case this # operation is aborted or interrupted we ensure that we either have the # old or the new version available. if (old_addr = find_obj_addr_by_id(id)) old_header = FlatFileBlobHeader.read(@f, old_addr) old_header.set_outdated_flag end crc = checksum(raw_obj) # If the raw_obj is larger then 256 characters we will compress it to # safe some space in the database file. For smaller strings the # performance impact of compression is not compensated by writing # less data to the storage. compressed = false raw_obj_bytesize = raw_obj.bytesize if raw_obj_bytesize > 256 raw_obj = Zlib.deflate(raw_obj) raw_obj_bytesize = raw_obj.bytesize compressed = true end addr, length = find_free_blob(raw_obj_bytesize) begin if length != -1 # Just a safeguard so we don't overwrite current data. header = FlatFileBlobHeader.read(@f, addr) if header.length != length PEROBS.log.fatal "Length in free list (#{length}) and header " + "(#{header.length}) for address #{addr} don't match." end if raw_obj_bytesize > header.length PEROBS.log.fatal "Object (#{raw_obj_bytesize}) is longer than " + "blob space (#{header.length})." end if header.is_valid? PEROBS.log.fatal "Entry at address #{addr} with flags: " + "#{header.flags} is already used for ID #{header.id}." end end flags = 1 << FlatFileBlobHeader::VALID_FLAG_BIT flags |= (1 << FlatFileBlobHeader::COMPRESSED_FLAG_BIT) if compressed FlatFileBlobHeader.new(@f, addr, flags, raw_obj_bytesize, id, crc).write @f.write(raw_obj) if length != -1 && raw_obj_bytesize < length # The new object was not appended and it did not completely fill the # free space. So we have to write a new header to mark the remaining # empty space. unless length - raw_obj_bytesize >= FlatFileBlobHeader::LENGTH PEROBS.log.fatal "Not enough space to append the empty space " + "header (space: #{length} bytes, object: #{raw_obj_bytesize} " + "bytes)." end space_address = @f.pos space_length = length - FlatFileBlobHeader::LENGTH - raw_obj_bytesize FlatFileBlobHeader.new(@f, space_address, 0, space_length, 0, 0).write # Register the new space with the space list. if @space_list.is_open? && space_length > 0 @space_list.add_space(space_address, space_length) end end # Once the blob has been written we can update the index as well. @index.insert(id, addr) if @index.is_open? if old_addr # If we had an existing object stored for the ID we have to mark # this entry as deleted now. old_header.clear_flags # And register the newly freed space with the space list. if @space_list.is_open? @space_list.add_space(old_addr, old_header.length) end else @f.flush end rescue IOError => e PEROBS.log.fatal "Cannot write blob for ID #{id} to FlatFileDB: " + e.message end addr end
Private Instance Methods
# File lib/perobs/FlatFile.rb, line 851 def checksum(raw_obj) Zlib.crc32(raw_obj, 0) end
# File lib/perobs/FlatFile.rb, line 941 def clear_index_files(dont_close_files = false) erase_index_files(dont_close_files) # Then create them again. @index.open @space_list.open end
# File lib/perobs/FlatFile.rb, line 855 def cross_check_entries errors = 0 @progressmeter.start('Cross checking blobs and index', @f.size) do |pm| each_blob_header do |header| if !header.is_valid? if header.length > 0 unless @space_list.has_space?(header.addr, header.length) PEROBS.log.error "FlatFile has free space " + "(addr: #{header.addr}, len: #{header.length}) that is " + "not in SpaceManager" errors += 1 end end else if (index_address = @index.get(header.id)).nil? PEROBS.log.error "FlatFile blob at address #{header.addr} " + "is not listed in the index" errors +=1 elsif index_address != header.addr PEROBS.log.error "FlatFile blob at address #{header.addr} " + "is listed in index with address #{index_address}" errors += 1 end end pm.update(header.addr) end end errors end
# File lib/perobs/FlatFile.rb, line 888 def discard_damaged_blob(header) PEROBS.log.error "Discarding corrupted data blob for ID #{header.id} " + "at offset #{header.addr}" header.clear_flags end
# File lib/perobs/FlatFile.rb, line 894 def discard_duplicate_blobs(header, previous_header) if header.is_outdated? discard_damaged_blob(header) elsif previous_header.is_outdated? discard_damaged_blob(previous_header) else smaller, larger = header.length < previous_header.length ? [ header, previous_header ] : [ previous_header, header ] PEROBS.log.error "None of the blobs with same ID have " + "the outdated flag set. Deleting the smaller one " + "at address #{smaller.addr}" discard_damaged_blob(smaller) @space_list.add_space(smaller.addr, smaller.length) @index.insert(larger.id, larger.addr) end end
# File lib/perobs/FlatFile.rb, line 810 def each_blob_header(&block) corrupted_blobs = 0 begin @f.seek(0) while (header = FlatFileBlobHeader.read(@f)) if header.corruption_start corrupted_blobs += 1 end yield(header) @f.seek(header.addr + FlatFileBlobHeader::LENGTH + header.length) end rescue IOError => e PEROBS.log.fatal "Cannot read blob in flat file DB: #{e.message}" end corrupted_blobs end
# File lib/perobs/FlatFile.rb, line 921 def erase_index_files(dont_close_files = false) # Ensure that the index is really closed. @index.close unless dont_close_files # Erase it completely @index.erase # Ensure that the spaces list is really closed. @space_list.close unless dont_close_files # Erase it completely @space_list.erase if @space_list.is_a?(SpaceTree) # If we still use the old SpaceTree format, this is the moment to # convert it to the new SpaceManager format. @space_list = SpaceManager.new(@db_dir, @progressmeter) PEROBS.log.warn "Converting space list from SpaceTree format " + "to SpaceManager format" end end
# File lib/perobs/FlatFile.rb, line 831 def find_free_blob(bytes) address, size = @space_list.get_space(bytes) unless address # We have not found any suitable space. Return the end of the file. return [ @f.size, -1 ] end if size == bytes || size - FlatFileBlobHeader::LENGTH >= bytes return [ address, size ] end # Return the found space again. It's too small for the new content plus # the gap header. @space_list.add_space(address, size) # We need a space that is large enough to hold the bytes and the gap # header. @space_list.get_space(bytes + FlatFileBlobHeader::LENGTH) || [ @f.size, -1 ] end
# File lib/perobs/FlatFile.rb, line 911 def open_index_files(abort_on_missing_files = false) begin @index.open(abort_on_missing_files) @space_list.open rescue FatalError clear_index_files regenerate_index_and_spaces end end